Hong KongPostal History1936 (19 May) first flight envelope to Manlia (11.7), bearing Hong Kong 2c., 3c., 4c., 5c. and 6c. cancelled by Hong Kong c.d.s , with "Second Mandrid-Manlia Flight/ Aviator Fernando Rein/Arrived July,1932/Bureau of Posts, Manlia" commemorative h.s. in violet.