OB 5cm Kw K is a World War II-era German military bunker located in Normandy, France. This defensive structure was part of the Atlantic Wall fortifications built by Nazi Germany to defend against Allied invasion. The designation 'OB' typically refers to an 'Offiziersbunker' (officer's bunker), while '5cm Kw K' indicates it was designed to house a 5cm Kw K (Kampfwagenkanone) gun, likely a light anti-tank or defensive weapon system.
Situated in the coastal region of Normandy, this bunker represents the extensive network of fortifications constructed along the French coast during the war.