I'm new to this so please forgive me if this is a stupid question, but I was wondering if anyone could tell me whether the older Autavias (1960's) had different size cases. I'm referring here only to the original style round cased models, not the ones with the heavier, wider cases. I know some of the earlier examples I've seen are 36mm in size, did they get larger as the decade progressed? Any information would be greatly appreciated. Thanks, David