1921 (16 Jan). 1st General Issue for the Whole Kingdom. Printed by the “American Banknote Company” (depicting King Peter I and King Alexander when Prince). 10p carmine, 15p purple, 50p olive-green, 4D blue-green, 5D carmine and 10D red-brown, Perf L12. Predominantly fine used horizontal pairs (value of 5D horizontal strip of three) all showing PAPER FOLDS (value of 15p DOUBLE PAPER FOLD). An attractive group.