I have been waiting for a history of these amazing watches from VC -- and you delivered!!!
The Mercator has fascinated me for a long time now. It was probably the first Vacheron that really caught my eye even before I "discovered" the 1921.
I slightly prefer the Mercator v. the Tribute to the Great Explorers simply because I like the retrograde hours/minutes hands representing the dividers -- that complication just seems to work so well within the theme of these watches. But I have to admit, I am a big fan of the wandering hours mechanism especially when executed so artfully as in these examples. The complication, if not the execution of it, seems very similar to, say, the AP Starwheel or even the Urwerk, correct? But here, VC employs the complication in the service of the elegant watch where the artwork of the dial seems to be the star of the show. With respect to the AP and Urwerk, both of which I admire very much (the Starwheel is a longtime favorite of mine), the wandering hour is the star of the show, with the watch built around the complication.
I am thinking, or rather fantasizing, that the North America Mercator (with "America" at the top of the dial, after all) would really complement my current VC collection, don't you think? I am sure it would be easy to come by and that I could afford it. LOL. But it would be prefect, no?
Thanks for writing this up and illustrating it so generously with the beautiful images. This one really sent me over the top.
Best always,
Robert