Speedmaster Pro St 71: produced in 74?

I have now received an extract from the archives for my Speedmaster Professional ST 71. The production date is 74. Can anyone comment? How can a st 71 been produced in 74? Serial nr is 32855xxx

plug the serial number in at this link to approximate when it was made. https://www.ilovemyspeedmaster.com/productiondateprediction/

But he has an extract already. 😕

Check the reference tables for what movement numbers fall in range. I don't have it on hand.

duh. Check here. http://speedmaster101.com/serial-quick-reference-to-78/

There is some overlap in serials between -71 and -74 references. It's possible, even likely, that -71s were produced over a wide range of years in the early 70s.

so no problem?

I would have no problem with it if all the features (dial, hands, case, bracelet, crystal etc) match up with a -71. The serial is in the correct range for a -71 which is all that maters. Throughout the vintage Omega lineup, the "year" denotation on the reference (-69, -71, -74 etc) is never an exact representation of the production date. I got a -71 as a "birth year" watch for me (born in November 1971). I knew it was one of the first produced, because it's a No-NASA back, but it wasn't until I got my extract that I found it was produced 9/30/71. Nobody outside of Omega themselves knows exactly when they started or stopped producing a particular reference, and it's certainly possible that yours was produced as late as 1974.

Here's one for sale on the Watches for Sale board. https://omegaforums.net/threads/197...ep-dial-1039-516-bracelet.83876/#post-1099503