Russia. (Burma Overland Mail). 1901. Registered Russian postal stationery envelope 5k violet upgraded with Yvert 38, 1k orange, Yvert 39, 2k green, Yvert 40, 3k rose, Yvert 41, 4k rose and Yvert 42, 5k purple tied by Moscow date stamp '18th Jan 1901' with circular 'R' hand-stamp and Moscou registration label, endorsed 'via Brindisi' in red crayon, addressed to Rangoon, Burma with Italy transit '4/2' and Sea Post Office transit 'Feb 18' and oval registered 'Sea Post Office' with '5435' endorsement in blue crayon in center and Rangoon arrival '28th Feb' on reverse.
A very beautiful six adhesive franking to Burma with scarce Registration Sea Post Office.