This is such an awesome Art Deco take on a Skeletonize watch case- every time I come across anything similar to this, I immediately scoop it up for the shop!
What you need to know:
Lug width: 18mm
Length & width of case "frame": 28mm
Length of watch lug to lug: 40mm
Movement is a 17 Jewel Automatic, Cal 9ARB