The 4cm kanón vz. 36 (i.e., 4 cm Cannon Model 36) was an anti-tank gun produced by the Škoda Works in 1930s. The gun was used in Czechoslovak border fortifications and after German occupation of Czechoslovakia it saw service in Atlantic Wall fortifications under the designation 4,7 cm Pak K 36(t). References Janoušek, Jiří. Československé dělostřelectvo 1918-1939, Corona, 2007. World War II anti-tank guns of Germany 47 mm artillery Artillery of Czechoslovakia Military equipment introduced in the 1930s