Omega Seamaster Calendar 2846-2848 7SC

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Can anyone confirm if Omega made a gold capped Seamaster Calendar under ref no. 2846-2848 7SC with cal. 503?
 
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Short answer is no. That caseback never came with that movement. It is quite heavily corroded, perhaps it was saved from a scrapped watch.
 
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US watch recased, at a guess. I have the US Collection version.
Recased and redialled. It’s junk. Or redialled with a caseback swap.