Variance between “Production date” scales/sites

Hi All,

Currently looking for a birth year speedmaster (1977) and to my limited experience there seems to be some discrepancies between the oft quoted hartmann scale, speedmaster101 and other production year sites.

I understand it’s an inexact science but I’m wondering if others have purchased a watch based on the estimates of these sites and then had an Omega extract either confirm or deny that information? And if so what site was the closest to the extract?

Thanks in advance.

I bought a 76 some time ago. I wasn‘t looking for a birth year watch but I checked on Ilovemyspeedmaster if my serial number was appropriate for a 76. I ordered an extract after I recieved the watch. The estimated date from Ilovemyspeedmaster and the production date were pretty close. Good luck with your hunt!

Thanks. After some trawling through here, it’s seems that (anecdotally at least) ilovemyspeedmaster provides fairly close dates when compared to an extract.