Here's a good original 1960s/70s era Bach 7C mouthpiece that will fit any standard cornet. It is stamped with "VINCENT BACH CORP. 7C" in small lettering. You will get the exact mouthpiece that is pictured.
Bach Silver Finish Brass Instruments
VINCENT BACH CORP Size 11-1/2A Vintage 1960s Cornet Mouthpiece - Excellent!! $79.12 - PicClick AU
BACH CORNET MOUTHPIECE 7C silver plated $159.39 - PicClick AU
Las mejores ofertas en Instrumento de Latón Corneta Bach Boquillas
Bach Mouthpieces – Design Variations – BachLoyalist
RARE VINTAGE Vincent Bach Corp 7C CORNET Mouthpiece SILVER Plated
Las mejores ofertas en Instrumento de Latón Corneta Bach Boquillas
King Vintage Trumpet Mouthpiece c.1960's Stamped 7C-Excellent
Vincent Bach CORP 7 Cornet 1960s Silver Plated