Quote from: Euphanasia on Aug 25, 2017, 10:45AMSo if a '50 had an 8" bell, it would stand to reason that a '52 like the one being sold would also have an 8" bell. It seems likely that this one has had a bell swap done. Or more likely, had a 6H tenon and slide added to it. There appears to be solder bleed around the tenon brace flange.
I have a '55 Burkle (7.5" bell) with the same engraving. 32H bell brace flanges are oval as opposed to the usual (Elkhart) diamond shape seen in the eBay images, but I suppose it could be a Burkle bell grafted onto a 6H frame.
The all-brass TS braces and brass/nickel bell brass are very unusual and likely retro-fit; I've never seen this on any Conn pro horn from the '50's.
Another possible clue, if the case is original to the horn: the '50's Burkles I've owned have all had burgundy-lined brown coffin cases with stitched leather handles, like the one in the image, whereas the 6H cases from the '50's are typically black or two-tone gray/black slim-line with blue or peacock blue linings.