Thank you for viewing! (^-^) For B♭ Clarinet Mouthpiece YAMAHA Y-12 It is. It's from about 50 years ago, and is now a very rare mouthpiece with a saxophone-like window shape. The following is my personal opinion. ↓ Opening is 1.2mm or more Made of phenolic resin With a wide sound It seems to be a jazz-style mouthpiece that produces a considerable volume. ↑ The shape seen from the bottom Resembles a Brilhart jazz mouthpiece. Many fine scratches. Slight distortion at the tip. I think it's a very rare and valuable item. For vintage enthusiasts, thank you. (._.) P.S. I am also selling various musical instrument-related goods. Please take a look at #kojikodikozigakkiaccessory. #Clarinet #YAMAHA #yamaha #Yamaha #Mouthpiece #Mouthpiece