I've never heard of a ref 4140 or 4141 before and didn't really notice the reference to it in Alex's article until you mentioned it. I am guessing there was a typing error and that our author meant to say the Historiques triple calendars was inspired/based on ref. 4240. The Antiquorum text stating a ref. 4141 is confusing to me as well.
Interesting pictures that you posted, especially the second one, because I don't think I've ever seen a VC triple date with dauphin hands. I wonder if the hands are original?
I think you've made a great find if ref. 4140/4141 really exist and are out there, somwhere.
Alex did all the job , I am just reading it again and again, and it seems to me that there was no typing mistake.
I see the lugs which are different from other references and which seems to have inspired the later model, a ref 4140 or 4141 "sounds likely", but infos are scarce.
These models are true icons.
I had the chance to have a 4764 in my hands once, I thank Alex, Stefani and the Vacheron team for that.
I looked at it 2minutes, said "nice", and let it pass to other collectors. I didn't realize my chance at that moment because I didn't take the time to "understand" which piece it is and what it represents in Vacheron History. Now I feel a bit stupid not to have spend hours on it