I recently purchased an old trumpet at a thrift store for $100. Based on the information I've gathered on here, the inscriptions, and by looking up the serial number (378141 , C.G.Conn LTD, USA, Elkhart IND), I surmise that it is a 1948 Conn with a Coprion bell. Was wondering if anyone could help me with the model name or perhaps the "12b, 22b" stuff I'm not sure about. This was an impulse buy, it is very tarnished but the valves seem brand new and when i cleaned it out the inside didn't have any build up just greenness. Would this be a sufficient trumpet to a beginner like myself, and was $100 too much to pay for this old tarnished trumpet, or is it a possible diamond in the rough? Any help is VERY MUCH appreciated as I'm excited to start blowing my brains out on this thing.