The American Automobile Industry in World War Two
An American Auto Industry Heritage Tribute
By David D Jackson

Overview      The U.S. Auto Industry at the Normandy Invasion, June 6, 1944    The U.S. Auto Industry and the B-29 Bomber   U.S. Auto Industry Army-Navy "E" Award Winners   The Complete listing of All Army-Navy "E" Award Winners   Sherman Tanks of the American Auto Industry   Tank Destroyers of the American Auto Industry    M26 Pershing Tanks of the American Auto Industry   Serial Numbers for WWII Tanks built by the American Auto Industry

    Automobile Manufacturers:  American Bantam Car Company   Checker   Chrysler   Crosley   Ford   General Motors   Graham-Paige   Hudson
   Nash-Kelvinator   Packard      Studebaker    Willys-Overland

General Motors Divisions
(Undergoing development) Aeroproducts   Brown-Lipe-Chapin   Buick   Cadillac   Chevrolet   Cleveland Diesel   Delco Appliance   Delco Products   Delco Radio   Delco-Remy   Detroit Diesel   Detroit Transmission   Electro-Motive   Fisher Body   Frigidaire   GM Proving Grounds   GM of Canada   GMC   GMI   Guide Lamp   Harrison Radiator   Hyatt Bearings   Inland   Moraine Products   New Departure   Oldsmobile   Packard Electric   Pontiac   Saginaw Malleable Iron   Saginaw Steering Gear   Southern California Division   Rochester Products   United Motors Service

Truck and Implement Manufacturers:   American LaFrance   Autocar  Diamond T   Caterpillar   Clark Equipment Company   Cleveland Tractor Company   Federal Motor Truck   International Harvester    Mack Truck
   Marmon-Herrington Company   Massey-Harris   Pacific Car and Foundry  Reo Motor Car Company   R.G. LeTourneau   Seagrave Fire Apparatus   Ward LaFrance Truck Corporation   White Motor Company

Automotive Tire
   B.F. Goodrich    Firestone Tire and Rubber Company
 Updates and Additions  


Diamond T in World War Two / WWII
Chicago, IL
Rest in Peace
This page updated 6-14-2017.

Diamond T produced automobiles from 1905-1911, before concentrating strictly on  trucks.  In 1967 it merged with Reo in Lansing, MI to become Diamond Reo. At the time, both companies were owned by White Motors.  In 1975 Diamond Reo went out of business.

This pre- World War Two Diamond T Paddy Wagon is on display at the National Military Historical Center, Auburn, IN.  Author's Photo.

Diamond T won the Army-Navy "E" for Excellence Award four times during WWII.

Diamond T World War Two / WWII Production Numbers:  (6,554) M20 12 Ton 8x4 Prime Movers, (12,421) M2-M3 series Halftracks, closed and open (after mid 1943) cab series 4 ton 6X6s cargo, dump, pontoon and special purpose trucks. The company produced (6,420) wreckers 4 ton 6x6 wreckers.  All of these vehicles had varied model numbers.

The company was 47th in dollar value of WWII production contracts.


 This Diamond T M3 halftrack built during the Second World War was on display at the 2014 Spirit of St. Louis Air Show.  Author's photo.

Diamond T built 12,421 halftracks for the war effort.  Author's photo.

Author's photo.

Author's photo.

Author's photo.

This photo is looking into the back through the front passenger window.  Author's photo.

This Diamond T 1943 M3 Half Track was seen at the MVPA gathering in Portland, IN on September 20, 2014.  Author's photo added on 9-27-2014.

Author's photo added on 9-27-2014.

Author's photo added on 9-27-2014.

An M20 12 Ton Prime Mover from the collection at the National Military Historical Center, Auburn, IN.  Now this is a real truck!  It is painted in British colors as they were the first to use it.  First application for the M20 was pulling tanks in the North African desert.

Diamond T!

The next five photos detail this Diamond T closed cab 4-ton 6X6 dump truck built in 1943.

There are no headlights but it does have one blackout lamp.

The Diamond T logo is still mounted on the hood.  In 1942-43 the military directed that manufacturer's IDs be removed from all vehicles making this one of the last to still have the logo.

As seen at the MVPA 2013 Rally at the Ropkey Armor Museum.

This Diamond T mid 1943 closed cab 4-ton 6X6 wrecker that does not have the manufacturer's ID on it.

As seen at the MVPA 2013 Rally at the Ropkey Armor Museum.

This Diamond T is on display at the Canadian War Museum in Ottawa, ONT.  It is designated as a Model 975A Type M Machinery Truck.  Author's photo added 9-13-2016.

 Author's photo added 9-13-2016.

 The Diamond T Model 975A provided the Canadian Military with a chassis for a mobile machine shop. Author's photo added 9-13-2016.

 Also on display the museum is this Diamond T Model 968 Wrecker, or Breakdown Truck.  Author's photo added 9-13-2016.

 On display at the 2017 WWII Weekend in Reading, PA was Diamond T Model 968 Wrecker.  Author's photo added 6-14-2017.

 Author's photo added 6-14-2017.

 The distinctive "T" for Diamond T is on the radiator grill.  Author's photo added 6-14-2017.

A Diamond T wrecker pulls, what appears to be, a 4 or 5 ton 4x2 tractor into a maintenance area.

A Diamond T wrecker is towing a captured German tank.

This derelict Diamond T World War Two wrecker is located at the Fort Economy Museum in Hallsville, OH.  Author's photo added on 1-24-2016.

 Author's photo added on 1-24-2016.




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