Air Canada 1,8,9,16,18
Canada
Horizontal tab and coversheet
1,8: (PS 2051 up/star down)
- paper
- flat base with coversheet
- horizontal tab
- zigzag cut
- manufacturer on coversheet:
PS 2051 up/star down
1: star upside-down
9,16,18: (star up/PS 2051 low)
- paper
- flat base with coversheet
- horizontal tab
- zigzag cut
- manufacturer on coversheet:
star up/PS 2051 down
9: PS 2051 4 mm high

18: PS 2051 5 mm high
16: PS 2051 6 mm high & number 1 is different
