The good news:
It is Omega, not fake
It is solid 18K gold case
Has bumper movement cal 342
Bad news:
Redial (which you knew or suspected already)
Condition is not good due to polishing
It is not a Seamaster- but a Tresor
It is not worthless, and you can wear and enjoy it (does it run?) So I would do so, and search for another over time, but research a reference you like and educate yourself so you don't make similar mistake. And I suggest posting pictures and info on future prospective purchases here
before pulling the trigger. Many others have paid much higher noob tax- dont feel bad about it!