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Old 5 July 2016, 11:41 PM   #120
sheldonsmith
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Quote:
Originally Posted by slorollin View Post
A question for all of you GMT experts out there.......... Can you tell which movement is in a "Z serial" GMT ll without popping the case? All I find are statements like: "early Z series had the 3185, later Z series had the 3186". Does anyone know the cutoff point of the serial numbers where after ZXXXXXX all movements are 3186?
I have a couple methods to discern 3185 vs 3186 posted at https://www.minus4plus6.com/paracromblu16710.php#crown

-Sheldon
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