Charles Bay MO-M (1.17mm) Bb Clarinet Mouthpiece
Older Charles Bay Bb Clarinet Mouthpiece. This one was actually made by Charles Bay...there were many Bay blanks that were sold after he passed away that were finished by someone else many of which are on eBay. This one is marked, "MO-M" "Hip Z 767" or something like that. Excellent condition.