Model #8250 1C
Model #8251 1-1/4
Model #8252 1-1/2
Model #8253 3C
Model #8254 5C
Model #8255 7C
Model #8260 7E
Model #8270 1-1/2CFL

The classical mouthpiece from the 50's but reviewed and improved by Stomvi's research team to provide a better sound result.
 
Labeled with traditional numeration 1C, 1 1/4C, 1 1/2C, 3C, 5C, 6C, 7C.

Stomvi Old Style mouthpieces equivalences: