Cuba, Postal Card, 1899, 1c on 1¢ black on buff, "Ultramar" Overprint. Mint card with blue straight line handstamp "Ultramar", Extremely Fine and scarce. Scott No. UX1 var.  Estimate $200 - 300. This item is from an original Postal archive distributed by the UPU to its member nations for the period from approximately 1899 thru to 1942. Receiving authority specimens are of Philatelic importance as they provide confirmatory evidence that these were in fact distributed by the UPU. The best known Receiving authority specimen is the ?ULTRAMAR? handstamp applied either in violet or in blue to UPU distributions sent to the Portuguese Ministry for the colonies during the period 1895-1910. In this period, it is believed [Bendon] that only 25 examples of each stamp were thus overprinted; and it is quite certain that some (probably most) of those no longer exist due to the privations of war, climate, and time. $0 (Image)