https://www.ebay.co.uk/itm/132308960598Purchases made through these links may earn this site a commission from the eBay Partner Network This looks like a replica to me. Hands look like filled in versions of "bond models" and bezel looks like older models. Please educate me if I'm wrong.
Those filled in hands were used on a heap of Japanese market versions of the Seamaster, I'd not seen them on that reference before but I've never looked into it that much or owned one.
Looks perfectly fine to me... IIRC, the most normal tell on fake Seamasters are the positioning of the helium valve and the fit and finish/look of the clasp and bracelet, both of which looks fine to me here. A number of replica sites offer this for sale, I can see, but all of the ones I've found have featured stock Omega photos and not pictures of the "actual fake".