ChinaChina / Yunnan 1929 Registered envelope to Tonkin
cover bearing Indo-China Yvert 127, 1c Orange and Pakhoi Yvert 65, "80c on 2f" Green and Black, mixed with Yunnan Yvert 51, "4/5 on 2c" Brown (Block of 4) and Yvert 61, "20 on 50c" Carmine and Black tied by Locbinh Tonkin datestamp with registered label sent Air Mail via Saigon, Hanoi and Lang-Son. Nice franking. (pt)
