Kong[Moderator]
7855
Welcome Joe_Lin...
to PuristSPro Chopard forum.
You will have to ask Chopard if you have not the papers.
With papers, the COSC certificate indicates the date of the calibre tested and certified. So you will know roughly the date of manufacture then.
As for the reason for 2 Geneva Seal marks, I'm just guessing.. one is on the bridge (with gold-plate) stacking on top of the bottom plate (platine).
The Geneval Seal is related to aesthethic, it is logical to tag onto a major components of the movement ie. the platine instead of a bridge.
Kong
Answers ...
By: Kong : February 17th, 2009-06:23
The answers from our L.U.C counterpart : The function is to hold the automatic wheel with ball bearing which is suspended. The golden colour is for cosmetic purpose, it is more attractive and that gives some contrast .
Welcome Joe_Lin...
By: Kong : March 10th, 2009-08:33
to PuristSPro Chopard forum. You will have to ask Chopard if you have not the papers. With papers, the COSC certificate indicates the date of the calibre tested and certified. So you will know roughly the date of manufacture then. As for the reason for 2 ...
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By: Robert Yeager : March 14th, 2009-22:05
joe_lin, can you post pictures of your 1860? Does it have a hinged hunter back covering the display back movement? If it does, is the number at the 12:00 position on the case back surrounding the display back marked as 1860, or is it marked as 16/1860/1? ...