Diamond T
United States · Founded 1905
Diamond T was an American truck manufacturer from Chicago known for premium medium and heavy trucks, military vehicles and post-war road tractors before consolidation into Diamond Reo.
- 7
- Models
- 7
- Generations
- 2
- Engines
Truck Models
Model 201
1938–1949
The Diamond T Model 201 was a pre-war light and medium commercial truck.
Model 509
1941–1945
The Diamond T Model 509 designation covered the company's wartime four-ton 6×6 military truck family.
Model 969
1941–1945
The Diamond T Model 969 was the wrecker variant of the wartime four-ton 6×6 family and served as a standard U.S. Army medium recovery truck.
Model 980
1941–1945
The Diamond T Model 980 was a heavy military tank-transporter tractor.
Model 301
Production period unknown
The Diamond T Model 301 was a post-war medium conventional truck family that carried the marque's styled civilian-truck identity into the 1950s.
Model 630
Production period unknown
The Diamond T Model 630 was a post-war heavy conventional truck.
Model 921
Production period unknown
The Diamond T Model 921 was a heavy three-axle conventional road-truck family from the company's final independent product era.


