Anyone has information about this Seamaster Calendar?

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Hi, pictures below are from the seller. From the shape of the date window, if I am not mistaken, it is from 1953 or after, and probably with a bumper movement. Anyone has further information (e.g. ref number, calibre) about and comments on the watch?

 
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The photos are pretty blurry, but the dial doesn't look original at first glance. Fonts are bad, minute track misaligned (e.g. at 12 o'clock).
 
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As Dan says, it’s a redial. The case should be a 2757 reference, however it has been heavily polished so it’s difficult to confirm without a photo of the inside of the caseback.

I would definitely pass on this one..
 
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Hey guys, finally got some quality photos of the watch and welcome your comments/ advice in purchase