German Half-tracks of World War II Identification Guide Part 19: 2cm Flak auf Fahrgestell Zugkraftwagen 1t aka Sd Kfz 10/4
The first self-propelled flak vehicle of the Wehrmacht, it was a small half track which carried the 2cn Flak 30 as its only mounted armament. The 2cm flak in its single barreled variant offered little ability on its own to stop enemy aircraft, due to both its relatively low caliber and the low rate of fire of this particular model. The rate of fire was a problem solved in the four barreled version, and to a lesser extent the stopping power, though this also brought more weight. The early versions had no crew cabin, while later variations added this. Similarly armor shields for the guns themselves were also fitted eventually. The sides of the superstructure folded down to offer a wider range of fire for the gun, and offered little protection to the crew or vehicle given its wire-like construction and small size. As shown in the top picture it was common for the vehicle to carry its own trailer of ammunition to augment the amount stored on board. Finally a crew of seven was required to fully man the vehicle.