Overprinted "SPECIMEN" diagonally towards the centre of the stamp, with punched hole at bottom right
Specimen stamp produced for printing order no. 8409 (1927), kept at the American Bank Note Company archives until it came onto the philatelic market in September 1990.
Overprinted "SPECIMEN" horizontally, with punched hole at bottom right
Specimen stamp produced for printing order no. 9919 (1940), kept at the American Bank Note Company archives until it came onto the philatelic market in September 1990.