GSGS series 4414. Sheet 2310, Third Edition (A.E.F.). First edition copied from German Topographische Karte 1:25,000 Sheet 2310 dated 1925 and photolithographed by the British Ordnance Survey in 1944. Third edition revised from air photographs March 1945 (I RCE). Lambert modified conical orthomorphic projection. Nord de Guerre Grid.
