4.7 cm KPÚV vz. 38
The 4.7 cm KPÚV vz. 38 is an anti-tank gun produced by the Škoda Works that saw service in World War II. Originally designed for the Czechoslovak Army, some were also sold to Yugoslavia. Wikipedia
Barrel length: 2.04 m (6 ft 8 in) L/43
Caliber: 47 mm (1.85 in)
Maximum firing range: 4,000 m (4,375 yds)
Shell: Fixed QF 47×405 mm R
Used by: Czechoslovakia; Nazi Germany; Kingdom of Yugoslavia; Romania