Diamond T
Successor Diamond-REO
Founded 1905
Defunct 1967
Headquarters Chicago, Illinois, USA
Products trucks
Diamond T 980 (3630 DW) at Riccall 2007 - DSC00463

A Diamond T 980 in the livery of Wynns Heavy Haulage who operated several of these tractors on Heavy Haulage operations in the UK and the Middle East

Diamond T at SE Davis 11 - IMG 9154

At SE Davis 2011

Diamond T Truck 1937

Diamond T Truck 1937

1958 Diamond T 630

1958 Diamond T 630

Diamond T Wrecker 1941

Diamond T Wrecker 1941

Diamond T 969A Wrecker 1943

Diamond T 969A Wrecker 1943

The Diamond T was an American automobile manufacturer based in Chicago, Illinois, USA from 1905 until 1911 by the Diamond T Motor Car Company.


The Diamond T was initially a marque of touring car (Automobile) with (models up to 70 hp were available).

The company later became known for its trucks. During World War 2, Diamond T produced a classic heavy truck in the model 980/981, a prime mover (tractor unit) which was quickly snapped up by the British Purchasing Commission for duty as a tank transporter tractor. Coupled with a Rogers trailer, the Diamond T gave sterling service with the British Army in North Africa, where its power and rugged construction allowed the rescue of damaged tanks in the most demanding of conditions.

By 1967, as a subsidiary of White Motor Company, it was merged with Reo Motor Company to become Diamond Reo Trucks, Inc.

Model rangeEdit

Diamond T manufactured two pickup trucks: the Model 80 and the Model 201. Both pickups were powered by the Hercules QX-series 6 cylinder engines. From the German Wikipedia

PKW Edit

LKW Edit

Before 1932
After 1932

Medium-duty trucks (before 1932)

Medium-duty trucks (from 1932)

 ? Lorry ? 1932

Heavy goods vehicles (before 1932)

Heavy goods vehicles (from 1932)

Military trucks Edit

of 1941
of 1941
  • Diamond T 980 (6x4) – Diamond T tank transporter – became the M20
  • Diamond T 981 (6x4) – Diamond T tank transporter – became the M20
Halftracks of 1940)'
Trucks of 1953


Wynns Diamond T

Diamond T in Wynns livery

Several examples of the Military Diamond T tank transporter are in preservation as either Tank transporters or as recovery trucks which some were converted into post war. A number were re engined with diesels and fitted with different cabs in the 1950s by several operators. Wynns of Newport in Wales had 22 of them in there post war fleet.[1] Several rx-Wynns examples survive in preservation.

Known examples include;

See alsoEdit

References / sourcesEdit

  1. The Wynns Fleet, page 45, by Paul Heaton, pub by P.M.Heaton Publishing

External linksEdit

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