I just bought an alto mouthpiece on eBay for fun and I wonder if anyone in the forum can tell me more about it.
It is marked Lewin Table 4, London, Made in England
Very large round chamber
It looks as if the ring round the shank was a separate item.
I have only played it briefly, and it sounds like a very clear classical mouthpiece to me.
There is some information on other SOTW threads that says that Lewin Bros, 17 Moor St., London W1, England, was a music shop in London, that sold stencil saxes (Martins).
So I'm wondering if this is a stencil mouthpiece.