Today in WW II: 23 Jul 1940 American Bantam and Willys-Overland submit the only two bids for the Quartermaster Corps light reconnaissance and command cars, the origin of the military jeep.  More 
23 Jul 1941 Original World War II contract for jeeps awarded to Willys with Ford added Nov 1941 to increase production.
23 Jul 1945 Submarine USS Barb [SS-220] destroys a Japanese locomotive and supply train at Patience Bay off the coast of Karafuto, Japan, the only known such attack by a submarine.
Visit the Olive-Drab.com World War II Timeline for day-by-day events 1939-1945! See also WW2 Books.

WC-1 WC-5 WC-12 WC-14 WC-40 Truck, 1/2 ton, 4x4 Dodge WC Closed Cab Pickup (G505)

The Dodge WC-1 and the very similar WC-5 WC-12 WC-14 and WC-40, are 1/2 ton pickup trucks with slightly different engines and other small differences. All have a closed metal cab based on Dodge civilian trucks. All are part of the WC model series G-505, built by Dodge during 1941 or early 1942.

If you don't have the vehicle dataplate, to differentiate you must know the U.S. Government registration number (Army number on the hood) or the serial number which can be found stamped on the left front frame.

Model Serial Number Range Hood Number Range
WC-1 8644701-8666216 W24615-W25789
W25792-W27189
WC-5 8644701-8666216 W001332-W001391
WC-12 8676901-88694193 W222266-W227043
W603856-W004123
W231275-W232274
W-80766*
WC-14 8676901-88694193 W003856-W004123
WC-40 81500001-??? W005371-W005645

Data from SNL G-657 Dodge Master Parts List. *W-80766 was a single unit with no body. Other data on the Dodge G505 main page.

WC-1 Truck, 1/2 ton, 4x4 Dodge WC Closed Cab Pickup (G505).  Hood number W-25979  confirms  WC-1 (1941 contract).
WC-1 Truck, 1/2 ton, 4x4 Dodge WC Closed Cab Pickup (G505). Hood number W-25979 confirms WC-1 (1941 contract).

Restored Dodge WC-14 on display at the Magic Valley Jeep Preservation Club Military Vehicle Show, Twin Falls, ID, 3 September 2007. Hood number W-0004035 is correct for a  WC-14 (1941 contract).  Door symbol and other markings are for the 9th Service Command, US Army.  Photo courtesy John Eickhof, owner
Restored Dodge WC-14 on display at the Magic Valley Jeep Preservation Club Military Vehicle Show, Twin Falls, ID, 3 September 2007. Hood number W-0004035 is correct for a WC-14 (1941 contract). Door symbol and other markings are for the 9th Service Command, US Army. Photo courtesy John Eickhof, owner.