Speedmaster 145.022-74 serial number question..

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I been hunting for a -74 speedmaster and came across this one which looks correct for the ref. However, the s/n is a 27 XXX XXX which dates to likely -68 ? Is this combination even possible ? Sellers photos.
 
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Seems like you already know the answer. Either the movement doesn't belong to the watch or the watch doesn't belong to the movement.
 
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Are you sure? Can you post a photo of the movement showing the serial number clearly? It's a cal 861, I assume.
 
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Seems like you already know the answer. Either the movement doesn't belong to the watch or the watch doesn't belong to the movement.

I was hoping I might be be wrong as the -74 s/n seems to span over a period over the 70's. Shame though, as the dial is quite nice

Are you sure? Can you post a photo of the movement showing the serial number clearly? It's a cal 861, I assume.

Yes, the seller has the 861 movement picture and stated in text.
 
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Yes, the seller has the 861 movement picture and stated in text.

On OF, seeing is believing. I can't tell you how often newbies post things that turn out to be wrong. If the photo is blurry, the serial could start with 37M. Big waste of time for everyone.
 
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That’s not a movement that would have been in a 1974 watch. That movement is clearly pre 1971 production as it has a metal brake which changed to Delrin in 1971.
The movement and rest of the watch are not original to each other.

Dial is clearly 1974-1977 production
Bezel is correct until the mid 80’s from 1969 ish.

Avoid the watch.
 
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Late to the party, but I like the 70s stuff, so jumping in to support the views above. The -74s do carry a wide range of SNs, but not quite this wide.

Edit: By the way, aren't the sellers photos taken with a copy of MWO as a backdrop? I'd assume therefore they are aware of the mismatch 😕
Edited:
 
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Just came across this in the MWO book, could be interesting...

yeah and I disagree with 2 statements in that picture. If they ever state their proof of that I’ll agree. But my understanding is that was observed via caseback not an extract.

it also contradicts the problem of so many observed -74 step dials.