Very nice example. Mid to late 60's.
Yes, various dials were offered. Provided that the movement in your watch is in good condition, which is a reasonable expectation, you have yourself an extremely attractive original watch. The dial is excellent and the case looks to have taken little if any polishing. Congrats on a nice piece. The buckle isn't on any of the pics you posted, I'd be interested to see it if it's an Omega buckle.