A military structure designated FL243b is located near the commune of Plounévez-Quintin in the Côtes-d'Armor department of Brittany, France. The precise nature, historical context, and original function of this site are not confirmed by available sources. The region of Brittany has a long military history, including fortifications from various periods, but no specific information links this particular designation to a known bunker type, era, or event.
Its current condition and purpose remain undocumented in the provided search results.