I finally figured it out.
The watch case looked suspiciously like a Tiffany & Co., but there was
no similar watch on the Tiffany site. After a bit of searching I discovered the
Tiffany & Co. Grand 8-day jump hour. The movement is made by Vaucher and I
suspect is the same movement found in the Parmigiani 8-days. A very striking
watch, I will see whether I can find out more about it.
- SJX