A military structure identified by the German designation 'OB 22cm Geschütz' (likely referring to an 'Oberbefehlshaber' or command position for a 22cm artillery piece) is located near the given coordinates in France. The specific historical context, construction date, and precise function of this site are not confirmed by the provided search results. The region of Brittany, where these coordinates are situated, saw significant military fortification during various historical periods, including World War II.
However, without direct evidence linking this particular designation to a known bunker type, regiment, or construction project, its detailed history, architectural features, and current state remain unverified. Further localized historical or archaeological research would be required to establish its definitive identity and significance.