Hong Kong. (Airmails.) 1936. Air Mail envelope 'China National Aviation Corp. Service / Flight Airmail from Hong Kong' addressed to Swatow bearing SG 127,30c purple and yellow, SG 134, 5c green and indigo tied by 'Hong Kong /Air Mail' double ring routed via Victoria with Chinese Imperial Post Swatow arrival on reverse. Nice item paying the 35c Air Mail rate.