Series Number Id: GSGS 3073. Edition number: 1, June 11th, 1915. "O.S.O. 1915." Detail, grid & contours black; German trenches & battery positions red; water, 2-fig coordinates & grid capital letters blue; British front pecked black. Not printed on reverse., Location: Research Collections; Fonds: WW1 Trench Maps: France; Box number: PC15; envelope_number: 400, Manuscript: British Line at the end of fighting on 1st day of Battle of Loos, 25-9-15, and various markings in old British front line in the Battalion's sector of attack on 25-9-15. Manuscript on reverse: 2/Lt. A. Waterlow, D Coy, 19th [St. Pancras Battalion] London Regt. [141st Brigade, 47th Division].