


The measurements:
Marzan small mouthpiece:
O.D. rim: 44.90mm
I.D. cup: 31.00mm
Rim thickness: 6.95mm
Throat: 8.40mm
Backbore @ tip: 11.30mm
Marzan Large Mouthpiece:
O.D. rim: 46.60mm
I.D. cup: 33.00mm
Rim thickness: 6.80mm
Throat: 8.30mm
Backbore @ tip: 11.30mm
All measurements are, of course, approximate.

I can tell that both small ends of the mouthpieces have been worked on to get them back in shape so the final measurement on backbore, my guess, are not original.
Is anyone familiar with these and more importantly, are there any other sizes? Also, who made them for Marzan?