Hong Kong. (French Indo-China). 1934. Envelope addressed to Hanoi, French Indo-China bearing Hong Kong SG 101, 2c green and SG 119, 3c grey tied by Hong Kong double ring,underpaid with 'T' hand-stamp with m/s 'T/ 37 1/2' in crayon and bearing French Indo-china postage dues SG 200, 1c orange/yellow (strip of three) and SG D207, 10c orange/yellow (2) tied by Hanoi/ Tonkin receiver. A rare item of postage due mail from Hong Kong to French China.