I actually have been trying to figure out the age myself
My estimate was 60's, but I'm by no means an Omega expert
Would love some help if anybody knows
Best way to know is to pop the caseback open, write down the movement number and send an email to Omega asking for information about your watch. They have a service that does that - you'll find on the website
Great looking watch btw. I don't think it's 60's based on the style - I'd say more likely 70's but it's a complete guess. I've never seen a vintage Seamaster that looks like this.