Composition of the series:
7 1/2 on 85c. tawny red overprint of 1° the type
7 1/2 on 85c. tawny red overprint of 2° the type
10c. on 1c. tawny
10c. on 2c. tawny red
50c. on 40c. tawny (84)
50c. on 55c. viola tawny
For a total of 6 stamps
Overprint 1° type: the base of of 1/2 to the height of the advanced part of the 2
Overprint 2° type: thinner and long base dll'1 more up, lines, 2 in smaller character