Los 1028
GENERAL FOREIGN COUNTRIES ISSUE: 1929, Numerals 5-15c. as uprated franking on Colombia 4 c. stationery envelope from Leningrad to Cali franked with five Russian adhesives cancelled by large "Leningrad-Berlin Air Link" cachets to "Berlin 5.5.31 20-24", plus Colombian National postage tied at "Barranquilla 25.V.1931" to "Cali 28.V.1931" bearing boxed "Buenaventura 26.MAY 1931" transit mark on revese., a fine flown combination cover
