Quote:
Originally Posted by foxytimes
Afaik the difference between a 18108 and 18308 is the movement. 18108 should be single quick set movement 3055 whereas 18308 runs with double quick set movement 3155. But don't know exactly when the change occured, should be end of 80'ish. So the 183xx DD imho would belong to the double quick set range
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I believe this is all correct - My understanding is that all 181xx references are simply SQ 180xx models with gem-set bezels and/or lugs, and all 183xx models are DQ 182xx models with the gems. Presumably the 18308 replaced the 18108 in 1988, at the same time the other DQ DDs came out.