|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|
|Dimension of stamps(mm.)|
|Size of souvenir Sheet (mm.)|
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.