https://www.etsy.com/listing/495588317/omega-speedmaster-professional-moonwatchThis watch is every where! “A-S. Service - Pre-professional dial with serial number 2498062 of a 145.012 but with a 861..not a 321.
It's a service dial or fake. Has moon caseback. Modern bezel New hands Service or??? Dial no step and luminova. Serviced to death, fake, Frankenstein???
Serial number is a 145.022-69 or -71 Someone may have cut down a 321 service dial for it. Less then 2500 would be generous. It might be an ok base for a mod but collectors value is shot.