KoralaroK

It could also be a genuine case/dial/bracelet with a non rolex movement...very hard to tell without removing the case back.  Not many of them around though.
 
If it has a plastic crystal...ask if it is slow set or quick set date, they look alike.  QS usually sells a little bit higher.
 
Good luck!

The picture is quite bad and doesn't help but it looks gen to me !

Someone offered to sell me this rolex oyster perpetual date .... is this gen?? thnx

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