Series Number Id: GSGS 2742a ("a" in red). Sheet number: 3. [Printed at OS]. Detail and contours black; 1914 system of squaring red; "Instructions as to the Use of the Squares" in red. Translations without accents in margin; scale in margin in yards only, and 1:20000 without comma; index to adjoining sheets in upper margin. A detailed, accurate pre-war French survey, photographically reproduced by the British. Used before regular series 1:20,000 became available. Probably the 2nd state; 1st had Instructions in black. Title and index diagram printed on verso., Manuscript in margin: 8 S[iege] B[attery] [?].
Location: Research Collections; Fonds: WW1 Trench Maps: France; Box number: PC14; envelope_number: 371.