c. 1930s. Kobdo - UK, Wallington, Surrey via Siberia. Single 1 tug lilac reinder fkkd env, rolling cachet, conbu, via Xunak (CCCP) Russian Soviet Federation. Extraordinary endorsed fkd envelope on comercial usage with transits reverse.

1937 (17 Feb). Kizil - Switzerland (5 MArch). Reg multifkd env with arrival cachet. Genuine proper circulation. VF.

1937 (12 Feb). Kizil - USA, NYC (14-15 March). Reg multifkd env wit arrival cachet several US transits. Genuine proper circulation. VF.

1937 (11 Feb). Kizil - Switzerland, Luzern (25 Feb). Reg multifkd env arrival cachet cds Swiss PO sent by Soviet Philatelic Association. Fine scarce genuine circulation.

1937 (18 March). Kizil - Switzerland (6 April). Reg multifkd env. reverse cds arrival. VF.

1937 (8 March). Kizil - Switzerland (23 March). Reg multifkd env. arrival cds. Fine.

1935 (25 March). Turan - Hungary / Budapest (12 April 35). Reg multifkd env. arrival cds. Fine.

1937 (7 March). Kizil - USA / NY (31 March). Reg mltifkd env transits + arrival cds reverse. Fine.

1929 (10 Sept). Kizil - Russia. Multifkd env + arrival cds (18 Sept 29).

1928 (16 Nov). Kizil - Russia. Multifkd env incl 1r + arrival cds (25 Nov).

1927 (10 Dec). Kizil - Russia. Env multifkd front + reverse. 5 values + arrival (18 Dec).

1927 (28 Nov). Kizil - Russia. Local multifkd env. + arrival. VF (5 Dec).