Distinguished SOTW Member
Thanks. Figures, seeing how I accumulated three or four without even trying.They are clarinet mouthpieces from Leblanc, one of the most famous brands of clarinets .
They are nothing special , they are rather plentiful and not exceedigly sought after. In any woodwind shops there will be lots of them resting in peace ( or pieces) in a drawer where they probably will be forever with very little chance to ever awake any interest.