Hey, I own a Seamaster 600 watch from the year 1968 or 1969, and it has the slightly rarer black clockface with a red crosshair on it. It's the same as this one atleast by appearance: https://watchestobuy.com/wp-content/uploads/2015/08/OmegaSeamaster600Exotics.jpg However, there are some scratches on the clockface cover glass/lens, and it's a bit hazed out due to time and wear. What is a clock like this worth? USD, EUR, doesn't matter. Edit: Forgot to add, it runs and the adjustments work just fine.
If you want help on a value range you really need to post photos of the specific watch you are asking about, not a different one poached off the 'net. Clear shots of the dial, the case/ lugs/ crown, the inside face of the caseback, and the movement are needed. If you are just after generic pricing check completed listings on eBay. You can also google the reference and look for old For Sale postings.
And appart from the actual state of the watch, with a dial similar to that, it could be a 132.019, a bigger 134.011 and perhaps even one of those 136.018 unishell cases...