Russia – Azerbaijan: 1923 (24 Feb). Registered cover to Berlin franked on reverse with pair of 5,000R on 2,000R and single and a strip of three 15,000R on 5,000R surcharged stamps, all tied by BAKU date stamps alongside 10.3 arrival cds. Front shows registration label and BAKU EKSPEDICIJA dispatch date stamps. Very rare cover. Sc. 39, 40
