OB 10.5cm Geschütz is a German World War II coastal artillery bunker located near the coast of northern France. This type of bunker was part of the Atlantic Wall fortifications built by Nazi Germany to defend against Allied invasion. The designation 'OB' refers to 'Oberbau' (upper structure), and the 10.5cm Geschütz indicates it housed a 10.5cm artillery piece.
These bunkers were strategically positioned along the French coastline to provide defensive firepower against naval and amphibious threats.