Here is an original Geoff Lawton 9*B hard rubber mouthpiece for baritone. This mouthpiece measures more than .125" on my Babbitt tip wand.
Geoff Lawton was a true innovator of mouthpiece design and a bit unsung in this regard as well. Since his work was in the UK for the most part, many of his early designs never made it over to North America. During the 1980s we began to see many American musicians gravitating to these well made, well designed mouthpieces.
This particular mouthpiece is made from top quality hard rubber (ebonite) and comes with its fitted ligature and unique cap. The "B" Chamber meant baffle which this thing has plenty of. For someone looking for a powerful, open tip baritone mouthpiece in rubber this will have you covered.