Composition of the series:
Regular mail
10c. gray slate
20c. tawny
25c. green
30c. orange
50c. violetto
75c. red
1,25 blue L.
1,75 + 25c. gray overseas
2,55 + 50c. tawny red
5 + 1 tawny red L.
Air mail
50c. red
80c. violetto dark
1 + 25c. tawny red
2 + 50c. blue
5 + 1 green L.
Air express
2,25 + 1 red L. and gray
4,50 + 1,50 green and tawny L.
For a total of 17 stamps
Regular mail
10c. gray slate
20c. tawny
25c. green
30c. orange
50c. violetto
75c. red
1,25 blue L.
1,75 + 25c. gray overseas
2,55 + 50c. tawny red
5 + 1 tawny red L.
Air mail
50c. red
80c. violetto dark
1 + 25c. tawny red
2 + 50c. blue
5 + 1 green L.
Air express
2,25 + 1 red L. and gray
4,50 + 1,50 green and tawny L.
For a total of 17 stamps