Thanks! So it's definitely not a MB I, right? I'll check out your website as well.I have Guardala photos on my web site to help with identification. The handmade DGs vary a bit in design. Either from evolution or customization by DG to make a sale. The arched baffle design of the tenor has been called a Traditional, Crescent, or Custom. But there are other tenor DG mouthpieces with these names that do not have arched baffles.