China, People's Republic: airmail labels 2

Some airmail labels from China People's Republic.

Year: 1962, Ungummed. Gunter Mair's catalogue no: CPR-A-10a, perforated 12½ , sheets, "PAR AVION" : 24.5mm, blue/white, 2**

Year: approx.1970, Ungummed. Gunter Mair's catalogue no: CPR-A-10c , roulleted (looking like perforated 6), sheets, "PAR AVION" : 24.5mm, dark violet-blue/white, 3***

Year: ?, Ungummed. Gunter Mair's catalogue no: CPR-A-?, roulletde H , sheets, "PAR AVION" : 24.5mm, dark blue/white, 2**

Year: ?, Ungummed. Gunter Mair's catalogue no: CPR-A-?, imperforated , sheets, "PAR AVION" : 25.5mm, blue/white, 2**