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Patek Philippe

vintage sweep second movements

 

Hi,

to expand on Roni's post, both the 565 and 2508 are screwback and thus water resistant.

There was the 12-120SC movement used in the 30's and 40's that was also center sweep second.

The 27SC being the most popular, it also had the double geneva seal signifying a chronometer rating... my all time favorite movement

John

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