Sheet 1B Khoi [First Edition] 1922. Registered 1920. Reg.No.4117. D 20 (D.O.6). 250. Turco-Persian boundary from Russian official 2 verst maps XX-16 dated 1916, XXI-16 dated 1914 & 16, XXII-16 dated 1914 and 1917, and XXII-17 dated 1914. Boundaries as on pre-war maps, but only Persian boundary coloured.