China / Manchukuo (Japan) 1940 Registered cover to USA

envelope from Harbin, bearing SG83, 3 fen brown, and SG92, 15 fen rose (3) tied by Harbin datestamp, routed via Moukden with registered label applied in transit and arrival on reverse in San Francisco. "U.S. CUSTOMS PASSED FREE S.F. CAL." (United States). (pt)    ID: 11528