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One of the visual differences between cal. 3000 and cal. 3130 is

 

that cal. 3000 uses a balance cock while the cal. 3130 uses a balance bridge.  No-date Submariner Ref. 14060 was powered by the cal. 3000.  When the reference was updated to ref. 14060M the movement was changed to the cal. 3130. 


From your picture, I see a balance cock instead of a balance bridge and the winding bridge has 3000 engraved on it smile  Plus, you say it's a 14060 not a 14060M.  Definitely a cal. 3000.

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