Is it worth reconsidering the year requirement. After all, the most common way to date a vintage omega is by the serial number charts. These can be out by +/- a couple of years either side.
There’s also the consideration of what the years means. Is it production year of the movement, the watch or sale year. For example a movement may have been made in 1971 and stored for a year before being use to complete a watch is 1972. This watch may have then been shipped to a retailer and sold in 1974.
What I’m getting at is personally, I think it’s nice to be in the right ballpark, but much more important the the actual year (whatever that means!) is that the watch is nice. The one you’ve posted above isn’t particularly in vogue at the minute and although they have their fans, there very much a product of their time, unlike some vintage Omegas which appear timeless.