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Old 1 May 2011, 01:28 PM   #1
harry in montreal
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Tech: how can a 1560 or 1570 power a GMT or a Datejust?

i realize that there is an extra hand on a GMT in the stack. how could rolex use 1560 or 1570 movements on both of these models?

just curious...

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Old 1 May 2011, 02:29 PM   #2
Tools
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The 24 hr hand on the early GMT's were simple synced hands to the main hour hand that turned at exactly half it's speed..

It's just a matter of adding a couple of extra gears to drive an additional hand - and an additional hollow staff to attach the hand to... Probably today they would have re-numbered the movement.
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Old 1 May 2011, 05:01 PM   #3
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Quote:
Originally Posted by Tools View Post
The 24 hr hand on the early GMT's were simple synced hands to the main hour hand that turned at exactly half it's speed..

It's just a matter of adding a couple of extra gears to drive an additional hand - and an additional hollow staff to attach the hand to... Probably today they would have re-numbered the movement.
X2 Larry and called it a completely new movement.
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Old 1 May 2011, 11:23 PM   #4
harry in montreal
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i have a 1570 in a datejust i dont wear, do you think i could modify it to run in a GMT?

sounds stupid, but i am being offered a deal on a parts watch with a rusted out movement.

THKS for you great comments !!!
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