A military structure located at the specified coordinates near the Saronic Gulf in Greece. The provided location name suggests a possible German WWII-era artillery position ('OB' potentially meaning 'Oberbefehlshaber' or 'Ostbefestigung', and '10,5cm Geschütz' indicating a 10.5 cm gun), which would align with the German occupation of Greece during World War II. However, the web search results contain no information confirming the existence, type, or history of any military bunker or fortification at these coordinates.
The results exclusively discuss modern military watches and surplus rifles, providing no historical or geographical context for this site. Therefore, the nature, purpose, and current state of the structure remain unconfirmed by available sources.