Quote:
Originally Posted by CTech
The US12049 engraving was put there by a Rolex service center to identify the watch as it went through their processes, and it will be the same number used on their service estimate and invoice documents.
They do this when the original serial number is illegible, and so this US number relates to the date of service, not the original manufacturing date.
There are a number of posts about these numbers, some with different country codes, such as the prefix HK when the watch was serviced in Hong Kong.
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Always learning something new in this game, thank you!
So if Rolex could not identify the serial number back when was serviced, it just makes sense that the op cannot read it.
Congratulations, very nice 1975 Explorer 1655!
