1925 (29 Dec) first flight Cristobal to Costa Rica, cover franked with 1/2c-3c Regular Issues, four different, tied by special commemorative cachets, with San Jose transit and Puerto Limon arrival pmks (Image)

Est.$150

1925 large part of a cover front from Canal Zone to Medellin, franked with 1c, 5c and 3x10c orange, paying 36c and charged Postage Due 0.20R (registration) on arrival, with SCADTA overprinted "P" 10c, 30c, 50c and 3p tied by red Barranquilla cds, some faults, but rare dispatch from Canal Zone (Image)

Est.$150