38 (German designation "4.7 cm Pak (t)") anti-tank gun on a converted open-topped Panzer I Ausf.

It was intended to counter heavy French tanks like the Char B1 bis that were beyond the capabilities of the 3.7 cm Pak 36 anti-tank gun and extended the life of the obsolete Panzer I chassis.

[1] A total of 202 Panzer I chassis were converted to Panzerjäger I standard in 1940–41, and were employed in the Battle of France, in the North Africa campaign and on the Eastern Front.

[1] For the remainder of the war, they were used solely by independent antitank battalions, with two exceptions post the Balkans campaign, one company was assigned to the SS-Brigade Leibstandarte der SS Adolf Hitler and another to PanzerjägerAbteilung 900 of Lehr-Brigade (mot.)

Five replacements were sent in September 1941 but only three arrived on 2 October, the others being lost when the freighter Castellon was sunk by the submarine HMS Perseus.

At the start of the British Operation Crusader the battalion was at full strength but lost thirteen vehicles during the battles.