A military structure identified by the designation 'OB 10cm K 17/04(n)' is located near the coast in southern Norway. The alphanumeric code suggests a possible German military construction or weapon emplacement designation from the World War II era, consistent with the extensive fortification projects undertaken by Nazi Germany in occupied Norway. The specific location, near the village of Vatne in the municipality of Lyngdal, Aust-Agder county, places it within a region that saw significant German defensive investment along the Norwegian coastline.
Without verifiable historical records or archaeological surveys from the provided sources, the exact function, construction date, and technical specifications of this site cannot be confirmed. The '10cm K' portion of the designation might imply a 10 cm cannon (Kanone), but this remains an inference based on common German military nomenclature, not a confirmed fact from the search results. The current physical state of the structure—whether it is intact, ruined, buried, or repurposed—is also unknown.
This entry is catalogued based solely on the provided location name and coordinates. Further research in specialized military history archives, Norwegian heritage databases, or local historical societies would be required to establish the bunker's verified history, architectural details, and significance within Norway's World War II coastal defenses.