Date on reverse of dial (Seamaster 176.007)

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I recently acquired a vintage Seamaster Chronograph 176.007. It’s currently being serviced by my watchmaker and he sent this photo of the back of the dial:


Whenever I’ve seen photos of the backs of dials here they have tended to be sterile, but I thought it was cool that it had a date stamp! I was curious as to whether this was common in vintage Omegas of the time, and whether any other 176.007 owners have compared this date stamp with an extract from the archives? I guess that the date stamp here would only refer to this component, but it would be interesting to know others’ experiences!

I’ll share photos of the watch when it’s back with me - it’s an incoming I’m really looking forward to as I have been chasing a calibre 1040 for a while.
 
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I have x2 new to me which due back from their first service and repair work in the coming weeks. These are my first 1040 as well. One extract just arrived (pdf) this week which is 1972. I suspect the watchmaker has not taken a photo from the back of the dials but I will let you know either way.
 
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No, this is not common in my experience.
 
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Just seeing this...

That is definitely interesting and something I've never seen - let us know if you get an extract how close that is to your dial stamp.
 
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I have x2 new to me which due back from their first service and repair work in the coming weeks. These are my first 1040 as well. One extract just arrived (pdf) this week which is 1972. I suspect the watchmaker has not taken a photo from the back of the dials but I will let you know either way.

I got my first set of photos back this week and they did not mention anything or picture the back of the dial.
 
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Just seeing this...

That is definitely interesting and something I've never seen - let us know if you get an extract how close that is to your dial stamp.
Thanks, Andy - EOA has been ordered, so I’ll be sure to share that. Meantime, here is a gratuitous shot of the finished piece:
 
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Just updating this - I now have my digital copy of the Extract from the Archives:

Delivery to the UK was expected, as was the supply on a Corfam strap - when I bought the watch it came with an aftermarket bracelet and I suspect the original Corfam didn’t last very long!

February 1973 is a little later than I had anticipated, but it does mean that the watch was produced nearly seven months after the date stamp on the obverse of the dial.

So there we have it!
Edited:
 
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Just updating this - I now have my digital copy of the Extract from the Archives:

Delivery to the UK was expected, as was the supply on a Corfam strap - when I bought the watch it came with an aftermarket bracelet and I suspect the original Corfam didn’t last very long!

February 1973 is a little later than I had anticipated, but it does mean that the watch was produced nearly seven months after the date stamp on the obverse of the dial.

So there we have it!
Interesting data points. Thanks!