Patr1ckd: The "Automatic" face was intended for export US/GB I would imagine, although yours show the FRE day name in German. Can you show a pic of the case back? That could provide some detail as to age.
Also, here is a link to a discussion on the 142, early SINN history... read the reply by SWEETS and his observation that Automatic could be after those watches with the K.... interesting about the early Sinn's being parts bin watches where Sinn was essentially an assembler in the early days.
Lately I got into Lemania 5100 movements but I never had any watches with this famous workhorse. Than quite unexpectedly I was lucky enough to pick up a Sinn 142 this week. I always loved the watch but never made any deeper research in its history. Ok, I knew all those claimed first place for...
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