Please help identify the manufacturer!

[Ultranova1984]

Hello! Would you so kind to help me to understand, what kind of instrument it is?
It sounds great! But where, when and by whom it was made I don't know...and can't find any information about this trombone.The fotos is in the dropme files link. https://dropmefiles.com/i00eF

[Posaunus]

It's difficult to read the bell engraving.

Could you please transcribe it for us?

[Ultranova1984]

Sure!
BN Baxter Custom made Northup LosAngeles.
Two letters after Baxter did not identify, instrument is not with me at the moment.

[Posaunus]

Aha! Baxter Northup Music is the oldest music store in California (since 1906), currently in Sherman Oaks, CA.

https://baxternorthup.tumblr.com/

Of course that doesn't answer your question as to the identification of the trombone. I expect they once sold a "stencil" line of (probably student) instruments made for them by an anonymous manufacturer. Doesn't look like an Olds (located in Los Angeles until 1954). Mouthpiece receiver looks King-like, but I think they would have been an unlikely stencil supplier. So, still a mystery.

[JohnL]

Given that it has a slide lock and a tenon nut, I tend to lean away from it being the typical pre-WWII mid-European peashooter stencil.

Is the tenon nut attached to the slide section or to the bell section?

When you get a chance, more pictures would help. Maybe a shot of the end crook and water key?

[Ultranova1984]

Sorry for the late answers its because of time difference.I will try to take a photo as soon as possible! Thank you all very much for your answers and interest in the topic.

[Ultranova1984]

Uploaded new photos! Please write your ideas about this horn.
https://dropmefiles.com/G1GdW

[Posaunus]

Looks like a nice unmarred trombone, with little wear, and no especially distinguishing characteristics, in playable condition. Would it "blend" with others? Who knows until you try it? Does it matter?

Who manufactured it? Still a mystery.