Hi,
I am new to the forum, so my apologies if my post is not appropriate.
I was looking for an Omega Cosmic on Ebay, and I found this one which got sold for $520. I am pretty certain that this is it not in his original version, and been described as:
- Cosmic 136.017, cal. 611
- Hand winding fully serviced
- Dial: original
- Glass: original

What do you think?
Thank you

 

What are the red flags for you? Given your choice of avatar, there's a specific Omega watch for you.

 

Is the only one I've seen having a the gold dial with the silver case

 

There were lots of dial variations and hand combinations for Omegas in...pretty much all models. Cosmics are no exception. Looks fine to me, though band is slightly narrow. The price isn't too bad for the condition, considering the recent service.

 

There is a very funky 70s Cosmic for sale in this price range on the Watches for Sale page, also serviced. I've worked a lot with the vendor/watchmaker and know him to be a very good egg!