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The Trip-lock crown is not the only reason that the Sub can go to extreme depths... It also has a thicker case-back that will not compress and press against the movement under the extreme pressure at depth.
The other watches with a Triplock Crown:
Daytona
Sub
GMT IIc
Sea Dweller
Deep Sea
Yachtmaster
Yachtmaster II
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Last edited by Tools; 2 March 2010 at 04:25 AM..
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