the stalinetz s-65 (or starlinze-65) was basically an improved design based on the s-60 and succeeding it on the production line from june 20 1937,it has an 65-75 hp m17 diesel engine. As of 1941 the stalinetz s-65 was the most numerous type of full-tracked artillery tractor with in the soviet army. The exact figure how many of the 37,626.