This is the Trumpeter 01526 kit in 1/35 scale, of the ‘German 3.7cm FlaK 37 auf Selbstfahrlafette – Late version’.
Starting in 1942, the 5-ton Zugkraftwagen was superseded by the 8-ton Zugkraftwagen as the selfpropelled mount for the 3.7cm FlaK. The 3.7cm FlaK 36 was replaced by the 3.7cm FlaK toward the end of 1944.
Starting in 1943, an armor radiator shield and crew cab were introduced as protection against shell fragments and small-arms fire.
Production of the Sd.Kfz.7/2 began in 1942, and continued to the end of the war, with about 1000 produced by the end of January 1945. Initially, there were nine Sd.Kfz.7/2 in each FlaK-Kompanie or Batterie; increased to 12 in October 1943.
Source: Trumpeter website