I think the offset letters stopped in the early 70's, so it could be early 70's back. SMS is supposed to be the shorter facing, (French curve), and M is supposed to be the longer one, (American curve), however, Bergs aren't consistant with their measurements. At all.
This is an older thread, you may not receive a response, and could
be reviving an old thread. Please consider creating a new thread.
Sax on the Web Forum
A forum community dedicated to saxophone players and enthusiasts originally founded by Harri Rautiainen. Come join the discussion about collections, care, displays, models, styles, reviews, accessories, classifieds, and more!