Hi Selva
Not my specialty but I'll try.
Here are the details:
Issued August 19, 1881
Overprinted issue of May 1, 1884 (SG 86 Scott 62)
5c violet (many color shades)
Rouletted 8
Red overprint
Mint Used
SG 133 Scott 99 .20 .20
a. "1391" instead of "1891" 2.50 1.75
b. Overprinted inverted 2.50 1.75
c. Overprint double 2.50 1.75
d. Overprint double, one inverted 2.50 1.75
e. Overprint double, both inverted 5.00 3.00 Catalog Values are in USD from Scott Specialized 2007
The stamp you show is really a "space filler" due to the missing lower left corner.
Jerry B