On Sunday, June 11, 2017 at 11:34:20 AM UTC-4, howard banks wrote:
Would some kind soul who really knows please tell us whether genuine Tost rings are ever(a) welded or (b) oval?

The correct rings are stamped LN 65091 on the big ring. The most recent production also have TOST stamped on them. The big ring is oval, the little ring is round.

30+ years ago, there was a different Tost ring set in use. It is not stamped with the LN 65091 designation. It is obsolete and should not be used.

best,
Evan Ludeman / T8