Omega watch verification

Hello
I'm new to the world of watchmaking and I'd like to be reassured about purchasing this Omega.
It has neither box nor papers, and the crown doesn't have the Omega logo, and the date sometimes has a little trouble turning.
However, it's automatic, and I find it to be in good condition.
Diameter: 36.5mm
That's it.
True or false.
And I'd be curious to have an estimate.
After I get back, I'll let you know how much he offered me for it.
Thanks in advance.

Il me la propose à 250€
État médiocre ? Ou exactement car j avais l impression qu elle était en bonne état tout de même ?

He sell me for 250€
Where is problem ? I has feeling it was in a good condition
It s my first watch and it for keept all life
Maybe after i buy another omega Genève or seamaster or constellation but for the moment i dont have the money

It may be in good condition, as you say, on the outside. But the movement—the mechanism—will probably need to be serviced. Even if it operates well, this is an old watch that needs oil and cleaning and possibly some new parts, and you and the seller may not know when that was last done. The cost of a proper service, as Dan said was saying, may be more than the watch itself is worth.

If you really like the way it looks, then that is no problem—buy, enjoy. But if you are only buying it because it is an Omega, then I agree with others: you would be wiser to wait and save some more money and find a watch that has more real value. This one is not a smart financial decision, and it is not a watch most collectors would consider buying.