Composition of the series:
Regular mail
10c. tawny red
15c. green gray
20c. red
25c. green
30c. tawny
50c. violetto
75c. red
1,25 blue L.
1,75 + 1 L. orange
2,55 + 2 red tawny L.
2,75 + 2 dark L. violetto
Air mail
25c. dark green
50c. gray
75c. tawny
80c. blue slate
1 + 50c. tawny yellow
2 + 1 blue L.
3 + 2 black tawny L.
Air express
2 + 1,25 tawny L.
4,50 + 2 tawny red L.
For a total of 20 stamps