It is not so easy to find one that is actually stamped with Fed #, proving indefinitely it's intended user and purpose. I've scoured the internet and I can't find a single other one that's actually up for sale. Having said that, if you can find one, I'd very much like to check it out. Wrench, Crescent, 8 inches - #41-W-486 - 8 inch Adjustable Wrench or Crescent Wrench was included in the prototype Ford GP, the early Script Ford GPW, and the Slatgrill Willys MB Tool kits as well as the tool kits for the standardized Willys MB and Ford GPW... At least up to the middle of 1943.
The 8 Adjustable Wrench is not listed in MB/GPW manuals as being part of the tool kit in 1944 and 1945. However it is listed as being part of the Motor Pool Mechanics tool kit.
So this wrench should be displayed as part of your 1941, 1942, 1943 GP, MB or GPW onboard tool set. Many companies made them including: Barcalo Buffalo, Fairmount, JP Daniels, Williams, Utica, Crescent, Diamond Calk, and others. Ford GP & Ford GPW part #GP-17023. This item is in the category "Collectibles\Militaria\WW II (1939-45)\Original Period Items\United States\Field Gear, Equipment". The seller is "deathrowhardon" and is located in this country: US.This item can be shipped to United States, Canada, Bahamas.