Many companies mainly specialize in instruments and their mouthpiece lines are just copied from other companies (I presume Bach) and I was wondering what they were. I have a few pieces from Benge and Blessing that I own and I wonder where they came from. Then there are also other manufactures that we don't hear a lot about like Conn mouthpieces (which is sold by MPCExpress exclusively on eBay it seems), Holton and various other manufacturers. Does anyone know what they are model/s after? If it is Bach, then which era are they from?