MFfan

I wish I could help. I know a lot of Concertone horns were made in Czechloslovia, from what ads I see, etc. I have an old Gretsch Pathfinder trumpet evidently made in Brooklyn , NY, ser 57944. Can't find anything out about it. The tubing is kind of weird, the ist and 3rd valve slides are configured so you can't put anything on it to help tune the usual notes. the main tuning slide has to be pushed in most of the way to get in serviceable tune. Otherwise, it is in good shape, plays well, with nice tone. I know Gretsch gave up their horn business at some point and are now mostly known for guitars. My serial is on the lower part of the 2nd valve. Dave