Kansu Air 1 Air Mail Unit Postage Stamp with Overprint Reading 〝For Use in Kan-Ning-Tsing District" (1949) (CD01)

Stamp SN : CD01
Stamp Name : Kansu Air 1 Air Mail Unit Postage Stamp with Overprint Reading 〝For Use in Kan-Ning-Tsing District" (1949)
Stamp Cat Standard : Air Mail Stamps
Stamp Cat : Aviation
Issue date : 1949-05-07

The stamps were overprinted in red by the Kan-Ning-Tsing District Head Post Office with the wording〝限甘寧青區貼用〞(restricted for use in Kan-Ning-Tsing District) stamped by hand with rubber chops piece by piece.