GSGS (Series) ; 2957. Second edition. Conical orthomorphic projection with two standard parallels. "Published by the War Office, 1921. 2nd Edition, 1931." "Compiled and drawn at W.O., heliozincographed at O.S. 1931."
GSGS (Series) ; 2957. First edition. Conical orthomorphic projection with two standard parallels. "Published by the War Office, 1934." "Compiled and drawn at W.O., heliographed at O.S. 1934." "NOTE:-The boundaries of Abyssinia with Italian and French territories have not been demarcated."
GSGS (Series) ; 2957. Second edition - AMS 1. Conical orthomorphic projection with two standard parallels. "Published by the War Office, 1923. 2nd Edition, 1939. First AMS Printing (Black and White) 1941. Second GSGS Edition 1939; (AMS1), 1942." "Compiled and drawn at W.O., 1923, heliographed at O.S. 1931."
GSGS (Series) ; 2957. Third edition. Conical orthomorphic projection with two standard parallels. "Published by the War Office, 1921. 3rd edition 1939." "Compiled and drawn at W.O., heliographed at O.S. 1940."
GSGS (Series) ; 2957. Third edition - AMS 1. Conical orthomorphic projection with two standard parallels. "Published at the War Office, 1931. First AMS Printing 1941. Third GSGS Edition, 1939-AMS 1, 1942." "Compiled and drawn at W.O., heliographed at O.S. and printed at W.O. 1939."
GSGS (Series) ; 2957. Third edition. Conical orthomorphic projection with two standard parallels. "Published at the War Office, 1924. 3rd edition (Communications revised) 1941." "Compiled and drawn by W.O. 1938, heliographed by O.S. 1941."
GSGS (Series) ; 2957. First edition - AMS 1. "First AMS printing (black and white) 1941. First GSGS revised edition 1934; (AMS 1), 1942". "Compiled and drawn at the War Office. Printed at the Ordnance Survey Office 1924." Conical orthomorphic projection with two standard parallels.
GSGS (Series) ; 2957. Third edition. Conical orthomorphic projection with two standard parallels. "Published at the War Office, 1924. 3rd edition (Communications revised) 1941." "Compiled and drawn at W.O. 1939, heliographed at O.S. 1940."