Stamps and Postal History of Spain, featuring China, Colombia – Prephilatelic Spanish period –, British Colonies, Japan, Portugal and Switzerland

CHINA. 1920. RUSSIAN POST OFFICE. 20c. on 20k. and pair of 7 dollars on 7k., each item cancelled by readable strikes of BUKHEDU and ST. BUKHEDU datestamps in black (Tchilinghirian fig. 575 and 576 respectively). Extremely rare.