a scarab-type overprint, normally handstamped across two stamps, was applied on the 1909-1919 regular postage stamp series to indicate a postage due usage. They were used ca. early 1921 through 1 April 1928 (the date of Afghanistan joining the UPU) on mail from the Peshawar, India, Post Office after the Afghani Post Office in that city was closed. After the Afghani Post Office closed, the mailers attempted to use the stamps of India for their posting of letters to Afghanistan, but such usage never was authorized. These issues are collected as pairs, or as singles if a complete strike of the overprint is present.