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OK, I am going to take a stab at it. I think the bottom number (16000) refers to the reference number and the top number (9166724) might be the serial number. According to various sites I looked up a serial number starting at 8614000 was made in 1985 and a serial number starting with 9290000 was made in 1986. So that watch was made towards the end of 1985. Someone please correct me if I am wrong.
Thanks, you are correct about the reference number (16000) but the other number is not the serial number, it does not tally with what is between the lugs but is original to this watch, the Rolex service paperwork tallies with the Rolex service marks inside too so it is not a case back from another watch.
I have never seen numbers like this in a DJ only a double red Seadweller
I was wondering if it might relate to the diamond dial maybe?
Thanks, Michael.
The watch is a factory diamond dial, could it be anything to do with that?
@michael e I am curious about something. Where did you get the watch? If you purchased the watch at a reseller maybe it's just some number that the store/distributor put on the back? I say that only because the 16000 looks different then the other number. That 7 digit number looks like it was put on at a later date like it almost looks new and not original?
If there were two more digits, I would have guessed that someone stamped their SS number inside. That's been known to happen.
Hey Dan, What is an SS Number? Is it like a serial number?
Sorry, in the US, people used to use their social security number as an ID number. At one point, the police recommended marking your valuables with that number so they could be identified if stolen. They are 9 digits, however, and usually they aren't marked so professionally.
Isn’t it a case band swap at Rolex, and then they engrave the original serial in the case back ?