The One-dollar Prexie
Registered, quadruple airmail rate to Argentina
Airmail to South America was twenty cents per half ounce from April 1, 1945 until November 1, 1946. Foreign registry cost twenty cents from February 1, 1945 until January 1, 1949.
This registered cover was sent to Argentina in April of 1946. It would have weighed between one-and-a-half and two ounces.