Air China 15,17,24,27,29,33,34,36
China
Chinese letters:

without fold line on back:
34:
- paper
- flat base with coversheet
- tear off tab
- tab attached
- straight cut
straight R in WATERPROOF
15,27:
- paper
- flat base with coversheet
- tear off tab
- tab attached
- straight cut
- manufacturer in the right gusset:
upside-down
15: straight R in WATERPROOF
27: round R in WATERPROOF
36:
- paper
- flat base with coversheet
- tear off tab
- tab attached
- straight cut
- manufacturer in the right gusset:
