M4 high-speed tractor

The M4 artillery tug was manufactured in Milwaukee by Allis-Chalmers starting in 1942. The vehicle was in service with the US Army until the early 1960s. Around 5,500 vehicles were produced between 1943 and 1946. [1] The tug was developed for pulling 90 mm anti-aircraft guns, 155 mm howitzers of the "Long Tom" type and 240 mm M1 howitzers. In the Bundeswehr, the tractor was used by the field artillery battalions until around 1960 to tow the M114, M115 field howitzer and the M59 field cannon. (Q: Wikipedia)

The highly detailed, unpainted model was produced using the 3D printing process and can be processed and painted with commercially available tools and colors (e.g. with Revell Email or Revell Aqua Color).