China, People's Republic: airmail labels

Here is another 2 complete sheets and partial sheet of airmail labels from China.

The first two sheets not listed in catalog.

Year: approx.1970, Ungummed. Günter Mair's catalogue no: - CPR-A-? (similar to CPR-A-13), perforated 8, sheets of 88(8x11), thin paper, black/light greenish-blue, 3***

  
 












Year: approx.1980, Ungummed. Günter Mair's catalogue no: - CPR-A-? (similar to CPR-A-20), perforated 10¼, sheets of 100(10x10), thin paper, ref.: Chinese letter + 1116 top of the sheet, black/light brow, 2**

Year: 1974, Ungummed. Günter Mair's catalogue no: - CPR-A-19b , rouletted, sheets, black-blue or dark blue/light blue, 3***