Conn Coprion Bell

[ChrisF]

Hi all. I'd like to buy a Conn Coprion Bell and I need some advice.
I got 3 options, but I don't know which one will be better or more professional.
1. 1942 -12H,
2. 1966 18H,
3. Director Shooting Stars, I believe is the newest, though all of them have scratches, etc

The thing is I couldn't find anything on google about the story of these Conn's trombones with the Coprion bell. Im wondering which one is the best option and professional model to buy?

Those that say Director on the slide, aren't they student models? Big thanks

Note: As we all know the 18H and the shooting have on the bell a few stars, the 3 band musicians marching and its counterweight says, Conn. The 12H is different, its copper bell looks darker, its graving says Conn LTD ( what do LTD stand for? ) and its counterweight has the three guys band marching, like the 6H played by JJ and many others.

[Matt K]

Just a heads up, you need three approved posts before people can PM you or see your email. I’m on my phone so I didn’t get a peek at how many you have.

I’m also selling my Conn corprion and if it isn’t listed yet I can give you details if you are interested. It sounds like it might be in better shape than those others. You can reply again and I can approve your post too if you are interested.

[elmsandr]

Hi all. I'd like to buy a Conn Coprion Bell and I need some advice.
I got 3 options, but I don't know which one will be better or more professional.
1. 1942 -12H,
2. 1966 18H,
3. Director Shooting Stars, I believe is the newest, though all of them have scratches, etc

The thing is I couldn't find anything on google about the story of these Conn's trombones with the Coprion bell. Im wondering which one is the best option and professional model to buy?

Those that say Director on the slide, aren't they student models? Big thanks

Note: As we all know the 18H and the shooting have on the bell a few stars, the 3 band musicians marching and its counterweight says, Conn. The 12H is different, its copper bell looks darker, its graving says Conn LTD ( what do LTD stand for? ) and its counterweight has the three guys band marching, like the 6H played by JJ and many others.

Only that 12H is a professional horn. After they somewhat 'failed' as pro-level horns, Conn used the process to make the director 18H... Those two are the same design level.

As for the 12H; I can never remember between the 10H and 12H, one is a 4H with Coprion flare, the other is a 6H. Neither are particularly rare, they aren't exactly common, as there were not tons made, but they aren't generally sought after.

They are fun to play around with, not sure I would ever do more that fiddle with one, however.

Cheers,
Andy

[mcphatty00]

I have the passive goal to find a 10H and take to bell to make my 6H modular.

[BGuttman]

Coprion was an experiment Conn made to try to make horns by a process called Electroforming. In Electroforming, you place a mandrel in a plating bath and build up the bell using electric current. This is different from most instruments that are made from sheet metal. Coprion is actually pure copper and its name was derived from "Copper Ion". I guess it was too hard to figure out how to plate pure brass for the experiments.

The 10H was a 6H with Coprion bell (0.500" bore)
The 12H was a 4H with Coprion bell (0.485" bore)

There was also a 70 series with a Coprion bell; either 76H or 77H (it's a tenor, and not a bass).

Coprion has a reputation of being very warm sounding at pp but very bright at fff. This variation caused it to be rejected by many pros who wanted a more uniform sound across the volume range.

[hyperbolica]

Yeah, the 10h is probably the rarest of the coprion group, it was the 0.500" bore version. I owned one for a while, and it was nice enough, but most people I think would prefer a 6h, or even a 48h, which had the nickel plated yellow brass bell and some fancy fittings, but was spec-wise similar to the 6h. 10h was fun to play for solos on ballads, but it was hard to play in a section. Coprion is really the extreme of red bell materials. You can find some other brands that have offered pure copper bells (Kanstul had one, maybe Rath, Reynolds and probably some others), but the Conns were the most successful.

12h was the 4h (0.485") equivalent with coprion, much more abundant than the 10h, and 18h was the student horn, more abundant still.

Generally, the coprion bells played very dark at lower volume, but could get crazy bright when you pushed them hard. Yellow brass starts out brighter, but doesn't get as crazy. The real draw I think is just the look. There are those who claim to like the sound, and claim that you can't crack a note, or it doesn't break up at volume. If you don't push them too hard, they don't get obnoxious. There seem to be opposing claims when it came to coprion at high volume. When I had my 10h, I kept it at low levels. It seemed to me to play best with a sound like you were in a smoky jazz bar playing really laid back ballads.

[ChrisF]

Just a heads up, you need three approved posts before people can PM you or see your email. I’m on my phone so I didn’t get a peek at how many you have.

I’m also selling my Conn corprion and if it isn’t listed yet I can give you details if you are interested. It sounds like it might be in better shape than those others. You can reply again and I can approve your post too if you are interested.

What model of Conn do you have? Send me pictures please. Thanks

[ChrisF]

Coprion was an experiment Conn made to try to make horns by a process called Electroforming. In Electroforming, you place a mandrel in a plating bath and build up the bell using electric current. This is different from most instruments that are made from sheet metal. Coprion is actually pure copper and its name was derived from "Copper Ion". I guess it was too hard to figure out how to plate pure brass for the experiments.

The 10H was a 6H with Coprion bell (0.500" bore)
The 12H was a 4H with Coprion bell (0.485" bore)

There was also a 70 series with a Coprion bell; either 76H or 77H (it's a tenor, and not a bass).

Coprion has a reputation of being very warm sounding at pp but very bright at fff. This variation caused it to be rejected by many pros who wanted a more uniform sound across the volume range.

Thanks for your response. I always read your comments.
So, of all my 3 options above, would you say to go with the 12H or the 18H?

2. The word Director on the slide, is for student models?
3. My other question was LTD what does it mean? thanks

[BGuttman]

Director was the student model. The 18H, one 20H, one 22H, and one 27H all were Directors. Conn reused numbers so there are non-Directors with some of these numbers. The first Director was right around the end of World War II to take advantage of the booming student market and has remained the Student model to this day.

LTD was because Conn called themselves Conn Ltd. like an English company. Ltd stands for Limited Liability, but only in the UK. In America the term is Incorporated (Inc.).

Note that the 12H is a professional grade instrument comparable to a King 2B or Conn 4H (i.e. small bore and most suitable to lead in Big Band or small combo). 18H came in two "flavors" -- one was 0.485" bore, and later ones were 0.500" bore. They are not bad instruments, but there were better models sold at the same time.

If you are looking for a more general purpose horn, I'd suggest you look elsewhere. Unfortunately, most of them will not be Coprion.

[ChrisF]

Hi all. I'd like to buy a Conn Coprion Bell and I need some advice.
I got 3 options, but I don't know which one will be better or more professional.
1. 1942 -12H,
2. 1966 18H,
3. Director Shooting Stars, I believe is the newest, though all of them have scratches, etc

The thing is I couldn't find anything on google about the story of these Conn's trombones with the Coprion bell. Im wondering which one is the best option and professional model to buy?

Those that say Director on the slide, aren't they student models? Big thanks

Note: As we all know the 18H and the shooting have on the bell a few stars, the 3 band musicians marching and its counterweight says, Conn. The 12H is different, its copper bell looks darker, its graving says Conn LTD ( what do LTD stand for? ) and its counterweight has the three guys band marching, like the 6H played by JJ and many others.

Only that 12H is a professional horn. After they somewhat 'failed' as pro-level horns, Conn used the process to make the director 18H... Those two are the same design level.

As for the 12H; I can never remember between the 10H and 12H, one is a 4H with Coprion flare, the other is a 6H. Neither are particularly rare, they aren't exactly common, as there were not tons made, but they aren't generally sought after.

They are fun to play around with, not sure I would ever do more that fiddle with one, however.

Cheers,
Andy

Thanks Andy for your response. I believe right now the best option I have is the 12H, though the 18H from 1966 is also a vintage right? btw it doesn't say Director on the leadpipe receiver like the Shooting stars.

[ChrisF]

Director was the student model. The 18H, one 20H, one 22H, and one 27H all were Directors. Conn reused numbers so there are non-Directors with some of these numbers. The first Director was right around the end of World War II to take advantage of the booming student market and has remained the Student model to this day.

LTD was because Conn called themselves Conn Ltd. like an English company. Ltd stands for Limited Liability, but only in the UK. In America the term is Incorporated (Inc.).

Note that the 12H is a professional grade instrument comparable to a King 2B or Conn 4H (i.e. small bore and most suitable to lead in Big Band or small combo). 18H came in two "flavors" -- one was 0.485" bore, and later ones were 0.500" bore. They are not bad instruments, but there were better models sold at the same time.

If you are looking for a more general purpose horn, I'd suggest you look elsewhere. Unfortunately, most of them will not be Coprion.

Thanks BGuttman for your response. well, the thing is, I'm looking for a Coprion bell for personal /artistic reasons. of course, I would like the instrument to have some quality as well. Conn is the most brand I have seen available out there, and also the most affordable. I own a king silver sonic 3b. an Olds recording, both beautiful horns.

[elmsandr]

Only that 12H is a professional horn. After they somewhat 'failed' as pro-level horns, Conn used the process to make the director 18H... Those two are the same design level.

As for the 12H; I can never remember between the 10H and 12H, one is a 4H with Coprion flare, the other is a 6H. Neither are particularly rare, they aren't exactly common, as there were not tons made, but they aren't generally sought after.

They are fun to play around with, not sure I would ever do more that fiddle with one, however.

Cheers,
Andy

Thanks Andy for your response. I believe right now the best option I have is the 12H, though the 18H from 1966 is also a vintage right? btw it doesn't say Director on the leadpipe receiver like the Shooting stars.

18H + Coprion bell = Director whether it says so or not. If you are unclear, take a look at Conn loyalist; the 10H and 12H have a lot more nickel trim, "reversed" tuning slides, nickel oversleeves, Nickel bottom slide bow, etc...

The directors aren't terrible, but they aren't the 10/12H.

Using the director bell on a 6H slide... that might be interesting, but I wouldn't spend much money on that.

Cheers,
Andy

[ChrisF]

Thanks Andy for your response. I believe right now the best option I have is the 12H, though the 18H from 1966 is also a vintage right? btw it doesn't say Director on the leadpipe receiver like the Shooting stars.

18H + Coprion bell = Director whether it says so or not. If you are unclear, take a look at Conn loyalist; the 10H and 12H have a lot more nickel trim, "reversed" tuning slides, nickel oversleeves, Nickel bottom slide bow, etc...

The directors aren't terrible, but they aren't the 10/12H.

Using the director bell on a 6H slide... might be interesting, but I wouldn't spend much money on that.

Cheers,
Andy

thanks

[ChrisF]

Guys thank you so much for all your replies.
For the 12H Im thinking of buying all serial numbers math but its patina is worn out.

Is it possible to refurbish it to make it looks new without losing its dark color?

if so, Would anybody recommend to me who does it?

Thanks

[Matt K]

Guys thank you so much for all your replies.
For the 12H Im thinking of buying all serial numbers math but its patina is worn out.

Is it possible to refurbish it to make it looks new without losing its dark color?

if so, Would anybody recommend to me who does it?

Thanks

First, here's a listing to the ad that I forgot to make last week:

https://trombonechat.com/viewtopic.php? ... 46#p183746

Looks like it's a 18H. I'm not sure the bore size. To me it doesn't play like some of the brighter Conn Corprions I've played but who knows. It could be the .485 model.

With regards to your question, the patina doesn't take long to develop but a really nice patina that's cured for awhile takes, well, awhile to get back. Especially if you're not in a humid environment. So if you refurbish the bell, it'll be shiny and get dimmer over time (or what you typically call "new"!). There are some things you can do to artificially make unlacquered brass patina faster, though I've never personally done it and I'm not familiar with any tech who offers the service (though I'd be curious if this is more common than I'm aware).

If you're interested in my 18 over the 12, I'd be happy to give it a satin finish which will clean up the bell, leave it unlacquered, and show you what it'll look similar to after a few months. I did that to a King 606 bell in March and it's patina is pretty nice looking now, but I live in a pretty humid climate.

[ChrisF]

Just a heads up, you need three approved posts before people can PM you or see your email. I’m on my phone so I didn’t get a peek at how many you have.

I’m also selling my Conn corprion and if it isn’t listed yet I can give you details if you are interested. It sounds like it might be in better shape than those others. You can reply again and I can approve your post too if you are interested.

which one do you have? Please send me the details about it. model, etc? thanks

[stewbones43]

Just a thought; are you aware of the Coprion bells on some Blessing trombones?

I used to have a Blessing Artist model with a Coprion bell-0.500in bore and 8in bell. It played nicely but I didn't need it and it had to go.

Cheers

Stewbones43

[ChrisF]

Just a thought; are you aware of the Coprion bells on some Blessing trombones?

I used to have a Blessing Artist model with a Coprion bell-0.500in bore and 8in a bell. It played nicely but I didn't need it and it had to go.

Cheers

Stewbones43

Okay, I will check that out. thanks

[Crazy4Tbone86]

Just a thought; are you aware of the Coprion bells on some Blessing trombones?

I used to have a Blessing Artist model with a Coprion bell-0.500in bore and 8in a bell. It played nicely but I didn't need it and it had to go.

Cheers

Stewbones43

Okay, I will check that out. thanks

Were any of the Blessing bells actually "Coprion?" Were they actually produced by electroplating copper on a mandrel?

I thought the Blessing bells were sheet copper spun on a mandrel. Maybe I am wrong.....Conn and Blessing did share a lot of parts. I just thought that the electroforming process was something unique to Conn.

[elmsandr]

Okay, I will check that out. thanks

Were any of the Blessing bells actually "Coprion?" Were they actually produced by electroplating copper on a mandrel?

I thought the Blessing bells were sheet copper spun on a mandrel. Maybe I am wrong.....Conn and Blessing did share a lot of parts. I just thought that the electroforming process was something unique to Conn.

Some Blessing bells were in fact electroplated. Many more (my estimate) were spun, I'm not sure if they were copper or red brass. I'm not sure who would have the best knowledge of when changes were made there, the folks that I know that knew the Blessing operations are now gone.

Cheers,
Andy

[Posaunus]

Wasn't the name Coprion trademarked by Conn?

[Crazy4Tbone86]

"Some Blessing bells were in fact electroplated. Many more (my estimate) were spun, I'm not sure if they were copper or red brass. I'm not sure who would have the best knowledge of when changes were made there, the folks that I know that knew the Blessing operations are now gone.

Cheers,
Andy"


Thanks Andy.....I did not know that. It doesn't surprise me though. After all, Blessing made so many models based on Conns in the second half of the 20th century.

Wasn't the name Coprion trademarked by Conn?

Yes, I think it was one of their many trademarked marketing terms. Blessing probably just called theirs "Seamless Copper Bells" or something like that. I cannot come up with any catchy terms that combine Blessing, Electroplated and Copper. How about "ElectroBlessed" or "BlessPlaCoppered?"

[elmsandr]

Wasn't the name Coprion trademarked by Conn?

Yes, I think it was one of their many trademarked marketing terms. Blessing probably just called theirs "Seamless Copper Bells" or something like that. I cannot come up with any catchy terms that combine Blessing, Electroplated and Copper. How about "ElectroBlessed" or "BlessPlaCoppered?"

Lol... Blessing, as a general operation, was far too cheap to anything that would represent "branding". Pretty barebones operation, even when I visited them in the '90s. They had a handful of full-time employees, but quite a bit of their labor were folks employed elsewhere in town picking up a few extra hours....

Cheers,
Andy

[KathleenDuRant]

How can you tell if a trombone has a coprion bell?
Thanks!

[BGuttman]

How can you tell if a trombone has a coprion bell?
Thanks!

Coprion was Conn's name for a pure copper bell. Coprion was electroformed, i.e. created from a plating bath. The plating mandrels limited Coprion to small bore instruments: trumpets, cornets, and small bore trombones. As long as the instrument isn't silver plated, the color will give it away.

Conn gave the Coprion instruments their own model numbers, so you have the 6H in brass and the 10H in Coprion (for example).

[KathleenDuRant]

I have the 1958 48H Conn Constellation with a nickel bell.
https://cderksen.home.xs4all.nl/ConnArticle20.html
This post says 'probably the 48H through 9xx,xxx.'
Mine is 754106
48H LW
If the bell is silver could you tell by the weight?
Thanks!

[BGuttman]

I have the 1958 48H Conn Constellation with a nickel bell.
https://cderksen.home.xs4all.nl/ConnArticle20.html
This post says 'probably the 48H through 9xx,xxx.'
Mine is 754106
48H LW
If the bell is silver could you tell by the weight?
Thanks!

I don't know of any solid silver belled 48H. Most of them had nickel silver bell flares (nickel silver is a copper alloy and has no silver in it).

Bells made from Sterling Silver (92% silver) will have a sterling mark (looks like an L with a line through it). King prided themselves on the sterling bells; Conn never did. There are a couple of custom made Conn silver trombones but pre 2000 they are VERY rare.

[KathleenDuRant]

When I say the bell is silver, I mean it is silver in color. It is nickel plated, as you said.
I would like to sell this horn and I appreciate all of the information. I have learned a great deal about it from this chat. I have only received messages from scammers on Reverb so far so I am wary of online sales.
Thanks!

[Mamaposaune]

Here are some pictures from a 1955 Conn catalog, it may be helpful, or at least interesting. (especially the prices!)
There was no 10H listed, that model must have come later. The 18H was the coprion-belled director.
I think there is also a description of the coprion process, but Bruce already did a good job of that.
They did not list bore sizes back then for some reason.

[brassmedic]

According to the Conn Loyalist, the 12H was discontinued and the 10H began production in the same year, 1955.

https://cderksen.home.xs4all.nl/ConnTrbHFull.html

[brassmedic]

I have the 1958 48H Conn Constellation with a nickel bell.
https://cderksen.home.xs4all.nl/ConnArticle20.html
This post says 'probably the 48H through 9xx,xxx.'
Mine is 754106
48H LW
If the bell is silver could you tell by the weight?
Thanks!

I am skeptical of the claim that the 48H ever had a coprion bell. We have discussed this before, and some people thought this belief was due to mistaking the layer of copper plating under the nickel plating for solid copper. My 48H is later than 999999, but I can see some copper plating showing inside of the bell, and after the plating ends it looks like normal yellow brass. It should be fairly easy to tell if yours is coprion by shining a flashlight into the bell and examining the unplated part of the inside of the bell.

[brassmedic]

The arrow is indicating where a small amount of the copper plating is showing, and beneath that you can see a spot where the yellow brass is showing.

20240115_111309.jpg

[KathleenDuRant]

This is very cool! The catalog is so interesting.

[KathleenDuRant]

A refrigerator costs about $120 in 1958 so these horns were an investment at the time.

[Posaunus]

The list price of a King 2B in 1958 was $240.

[KathleenDuRant]

https://www.metmuseum.org/art/collection/search/753559
James Carter "Jimmy" Pankow played a Connstellation in Chicago.

It does seem that if the Connstellation had a Coprion bell it would have been documented and the advertisements would still be available today.

[Posaunus]

The 48H Connstellation never had a Coprion (copper) bell. This is a red herring based on misinformation and misunderstanding. It's hard to put such myths to bed.

Per Conn, the 48H bell was Electro-D nickel-silver (yellow brass, copper, and nickel)-plated.

[Briande]

https://www.metmuseum.org/art/collection/search/753559
James Carter "Jimmy" Pankow played a Connstellation in Chicago.

It does seem that if the Connstellation had a Coprion bell it would have been documented and the advertisements would still be available today.

Jimmy played a lot of horns depending on sponsorship. He also played a 3B silversonic for a lot of year and now plays a Yamaha.