Auction 333-341 Nigeria, Cameroon, Sudan & Worldwide Postal History - Day 4

1902: Postal Stationery Card, 1 d. carmine, unused, "SPECIMEN" overprint in black diagonally to front, as well as a violet "ULTRAMAR" handstamp across imprinted stamp, fine and rare.
Note: The 'Ultramar' handstamp was applied in Lisbon to specimen stamps and postal stationery received from the UPU for distribution to the Portuguese colonies.