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Heuer Monaco 1133B McQueen.

abrod520
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As far as I know, not necessarily all Chronomatic-movement Heuers had the triangle stamps under the lugs. Speculating a bit I think it may have been an early service or production mark, as the original Cal 11s weren't produced for very long before being improved into the 11i (i meaning 'improved' 馃榿) and the 11i was standard.

Could also just be the result of polishing though I think...
 
K
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No, I do not think so.
Mine is an very early one, it is in the range of Richard Chrosthwaite "early Monaco serial numbers" .
And it was unpolished, when I got it!

An early service mark would be possible, but a friend has an early Autavia with 11i and that one has the two triangles, too.

One if the biggest Monaco collectors told me, that I should find such a mark under one lug (first, I have not seen it) and he was right!
 
NGO1
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K KP-99
No, I do not think so.
Mine is an very early one, it is in the range of Richard Chrosthwaite "early Monaco serial numbers" .
And it was unpolished, when I got it!

An early service mark would be possible, but a friend has an early Autavia with 11i and that one has the two triangles, too.

One if the biggest Monaco collectors told me, that I should find such a mark under one lug (first, I have not seen it) and he was right!


...speeding home to look for the tiny triangle...
 
NGO1
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Negative. 162 serial, no triangle on lug.

@abrod520, do you have any clue if my 162 carries the Cal11 or 11i? Here is that movement again.
 
B7766A44-17E3-45E0-B20F-25E41658249E.jpeg
K
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The swap was prior my ownership.
I got mine with Caliber 12 and was a bit of surprised, because I thought, an early one should have a Cal. 11(I).
So I contacted some collectors and one told me, that I should look for little stamped triangle(s) under one lug.
Think, the triangle marks a swap of the Cal. 11(i) against a Cal. 12 by Heuer.....
 
abrod520
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K KP-99
Think, the triangle marks a swap of the Cal. 11(i) against a Cal. 12 by Heuer.....

Something like this perhaps.

K KP-99
I got mine with Caliber 12 and was a bit of surprised, because I thought, an early one should have a Cal. 11(I).

Yes, 157xxx should have an 11 or 11i movement. HOWEVER: Remember the Chronomatic is a modular movement, and can be a true pain in the ass to service! So much so that in fact, many more recent modular chronograph movements were not even serviced when sent in, but replaced altogether. This was almost certainly the practice for Heuer back in the day, which is why it's not a huge red flag to find a Cal 12 in an early case.

I've also seen Viceroys with 11i movements (early serial ~272xxx) without stamps.
 
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