[Messines, Battle of, Belgium] : Oostaverne, part of sheet 28
Series Number Id: GSGS 3567; Sheet number: part of sheet 28. One of four maps out of a set of five 1:5,000 sheets prepared specially for the Battle of Messines (7th June 1917). Trenches to 1st April 1917. OS May 1917. [Enlarged from 1:10,000 trench maps]. German trenches red, with names blue. British front & support trenches in blue. Metre gauge railway in red., Location: Research Collections; Fonds: WW1 Trench Maps: France; Box number: PC14; envelope_number: 383, Manuscript on face: for use as artillery fighting map; artillery arcs & zero line (through Wytschaete church) in pencil.