The Rolex GMT-Master/Master II

[CBG1]

I have a question about the Y serials and their cases ... I see some with holes and some without. I am confused in my searches about the definitive answer and curious about the GMT-II's from that year, where some had the holes and some without. Is this the case, that there are Y's with and without? Is one more desirable (I know this is subjective, but in the case of the ever varying GMT, is there one more clear favorite?) Also, Is there a dimensional difference in the case/lugs, or is it purely cosmetic drilling vs. none?
Thanks,
Adam
(soon to be GMT-II owner ...)

[JJ Irani]

Originally Posted by CBG1

I have a question about the Y serials and their cases ... I see some with holes and some without. I am confused in my searches about the definitive answer and curious about the GMT-II's from that year, where some had the holes and some without. Is this the case, that there are Y's with and without? Is one more desirable (I know this is subjective, but in the case of the ever varying GMT, is there one more clear favorite?) Also, Is there a dimensional difference in the case/lugs, or is it purely cosmetic drilling vs. none?
Thanks,
Adam
(soon to be GMT-II owner ...)

Most of the Y-serials would have the lug-holes. These holes slowly started to disappear from the very end of the Y-series......Y-9XXXXX.

JJ