Based on the combination of a Czech 47mm anti-tank gun and the modified hull of the Panzer I Ausf B, 202 of these SPG's entered service in 1940. They subsequently saw action on all fronts, including North Africa, remaining in service in Russia until late 1943. Two types were seen, and this model represents the more numerous earlier type with a total of 132 built, first seeing action in the Low Countries. The remainder had the later extended upper superstructure and both types were deployed in the invasions of the Balkans and Russia. In North Africa, photographic evidence suggests that only the later type was deployed there.