1876 Issue
Usages On Cover

The postal rates in effect during the regular period of usage for this issue, prior to joining the UPU on July 1, 1879,  were (per one-half ounce):

1d. Antigua rate 
1d. printed matter rate
4d. Inter-Colonial rate
1s. packet rate to Great Britain
1s. 2d. rate, via England, to Germany

Universal Postal Union (UPU) rates in effect after July 1, 1879
4d. to UPU member countries

1d. lake-rose strip of four on cover to United States
4d. UPU rate (first month rate)
12 July 1879 "Antigua A" origin postmarks used as cancels
28 July 1879 New York Paid All transit backstamp

6d. blue-green pair on entire to Devonshire, England
1s packet rate
27 August 1878 "Antigua A" origin backstamp, barred AO2 cancels
11 September 1878 arrival backstamp