Here is a rare airmail label from Manchukuo!
Manchukuo was a puppet state in Manchuria and eastern Inner Mongolia, governed under a form of constitutional monarchy. The region was the historical homeland of the Manchus, who founded the Qing Empire in China. In 1931, the region was seized by Japan following the Mukden Incident and in 1932, a sympathetic government was established, with Puyi, the last Qing emperor, installed as the nominal regent and emperor. Manchukuo's government was abolished in 1945 after the defeat of Imperial Japan at the end of World War II.(wikipedia)
Year: 1933, Ungummed. Günter Mair's catalogue no: - MCH-A-1, perforated 10 ½ , sheets,
"PAR AVION: 27mm", black/grey-blue, 5*****