The Thirty-cent Prexie
Registered, with basic airmail postage of fifteen cents
Foreign registry cost fifteen cents from December 1, 1925 to February 1, 1945. Airmail to Costa Rica was fifteen cents from December 1, 1937 until April 1, 1945.
This cover was sent registered airmail from San Francisco to Costa Rica via Brownsville, Texas, on July 19, 1943.