Tanker
Is that a book on OSS equipment or holsters ?
Yes, there are a few of books (most out of print and can be expensive) on the holsters and pistols/revolvers:
-The Colt Pocket Hammerless Automatic Pistols , By John Brunner
-OSS Weapons Vol l &II, By John Brunner
-U.S. HANDGUNS OF WORLD WAR II (Pate)
-U.S. Military Holsters and Pistol Cartridge Boxes, by Scot Meadows