Yamaha 8c4, like a bach 10 1/2c but with nice rim and not as deep
Yamaha, Japan 8C4 Trumpet Mouthpiece.
Yamaha 11B4 mouthpiece trumpet / Yamaha 11B4 trumpet mouthpiece
Yamaha 11B4 Trumpet Mouthpiece (YAC TR11B4)
Yamaha 11B4 Trumpet Mouthpiece
Yamaha 18C4 Trumpet Mouthpiece
