A nice article, but...
you wrote;
The AEF order for Vacheron & Constantin was signed in May of 1918 for 5,000 pieces to be delivered in lots of at least 100 per month and 150-200 whenever possible. By the time deliveries concluded in 1920, a total of 3,289 Vacheron & Constantin timepieces had been received by the Corps. The great majority of these watches were single-button chronographs in sturdy silver cases, while a few time-only watches are also known. The general pattern for the Vacheron & Constantin U.S. Army Corps of Engineers watches was as follows:
Sorry to correct you but this is the first of many mistakes!
The order (to V & C) was for 2000 watches and nor as commonly cited 5000.
Regards