Vacheron calendar watches part 2 , reference 4140 ? or 4141

A little detail in this fantastic article I am reading two times a day at the moment. :)

http://www.thehourlounge.com/thread/view/quantum-leap-history-of-vacheron-constantin-calendar-watches-part-2_63289_63289.html

There is a reference 4140 or 4141 that we don't see in the article. And they inspired some models in the year 90s/2000s .

Do you have more info on these.


I have found this photo at Sothebys but no reference is indicated in the description.
Vacheron calendar watches part 2 , reference 4140 ? or 4141
And these at Antiquroum under the reference 4141 in the text
Vacheron calendar watches part 2 , reference 4140 ? or 4141

Vacheron calendar watches part 2 , reference 4140 ? or 4141

cheers

Francois
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