Sheet 27 Sebha GSGS 4231 First Edition 1941. Copied from map by 512 (A Fd Svy) Coy RE 1941. Original Italian map 1:400,000 dated 1932-34. GSGS 4231. Published WO 1941. Heliographed OS 1941. 1547/12/41.L.R. Libyan Grid; South Libyan Grid. Extruded to south-west for Múrzuch.