Seamaster 600 non removable case back

I am new to this thread and need you opinion and some facts on a watch I recently bought on impulse. Its a 1960-1969 Omega Seamaster 600 with date and a non removable caseback. It looks nice but after I started searching about the model I realised that a painted dial is not a good thing and yes it was mentioned in the description. Its just that I have no knowledge of these things. I have paid the equivalent of around $940. Was it too much? from the photos do you think everything else is ok, apart from the dial? After a quick check on the official Omega site, I noticed that they offer a full restoration service, but that costs a hefty $3500. Even so, do you think they would replace the blue dial with an original? Afterall, I did purchase it because I liked the blue dial!
I have never seen a watch with a non removable case back. Does this make it more special or something which people shy away from? I would imagine, specialised equipment is required to reach the movement for service and repair. Thank you

Hi DB70,
That particular case reference is a so called front loader, meaning you open it from the crystal side using a special tool.
It could be something like a ref. 135.020 if it is a manual wind, as the dial suggests (which could be incorrect).

Sadly, the dial, as you already correctly identified, is not original to this watch and, on top of that, is a rather poor repaint. To my knowledge, there is no Seamaster 600 in that kind of case configuration.

You might get lucky and find an appropriate dial on eBay or somewhere else and have it swapped.
BUT... if you like the watch as it is, you can also just wear it and enjoy it. As long as you don't sell it to the next person as "original", there is nothing wrong with that.

A service is recommended anyway, especially since the crown looks kind of crooked. I'm not sure what's going on with that.

Thank you guys for sharing your knowledge. I should have done this before I did the purchase, so its my fault realy. Lenndon was guessing if its a manual wind. I confirm that it is. So if you don t mind me asking, do you think there are other things which do not match the originality of this watch..apart from the dial, that is? Thks again.

The watch looks polished, but the crown and crystal (Omega logo in the center) seem to be authentic.

A manual wind movement could match the case reference if it were a 135.020, for example. But with that type of case, you also find plenty of configurations with a cal. 565, which would be automatic.

So until we see the inside of the case and the engraved reference number, it's hard to tell what this watch originally was.