1926, ''Sovtorgflot'' (Soviet Merchant Fleet) label in black, blue and red with worker 20k green is affixed over, used on reverse of registered cover from Vladivostok to Harbin (China), uprated by worker 4k carmine in vertical pair, tied by Vladivostok Train Station oval ''4.2.26'' date stamp, Harbin ''7.2.26'' arrival marking, damaged top right corner, still fine and scarce destination, Spec Cat. #31, Est. $150-$200 (Image)