This is a very rare vintage mouthpiece: a Vincent Bach Corp 1C (no dot) from the early Elkhart era. This size is particularly valuable and hard to find. It's a two-piece design with a top and a backbore. It includes the original Bach backbore and a #7 Schmidt backbore. It appears to have American-style threading that would allow for the use of backbores from Warburton and other brands, but I haven't confirmed this as I don't have any on hand. There are minor scratches and some plating wear, but as you can see in the photos, the shank is not bent. Thank you.