HELP! Is this 1957 Seamaster authentic & worth the buy?

The watch in which you’re interested looks promising, and similar in some respects, to my 1959 Seamaster. However, it would be helpful to know which movement it has (mine is a 591) and to provide better photos, including photos of the movement and an indication of the seller’s details and price. For your information, this was £400 at the beginning of 2019.

Hello @timseyeon and welcome to the forum! The first thing to do is to read these threads:
https://omegaforums.net/threads/learn-how-to-fish.52603/
https://omegaforums.net/threads/condition-condition-condition-and-other-pieces-of-advice.1716/

The next thing to do is scrutinize the pictures: Has the plating worn off the lug (red circle) or is that just a reflection? You need much better pictures of the entire watch - in-focus and evenly lit (outdoor shaded daylight often works well) - before you go any further.

See that wide gap between "Swiss" and "Made" (green circle)? That is sometimes an indication the watch has been partially repainted (redialed). Vintage watch collectors hate redials. 👎 So the next step is to judge the font type and location of the other text on the dial, including the minute markers. The pictures are too fuzzy to say for sure, but the other fonts don't look quite right to me either. Again, you need much better pictures.



You will also need pictures of the movement and inside caseback before parting with your cash, but I think there are enough questions raised that you need to resolve those before proceeding further.

The winder looks as worn as the watch