1900 2c Puerto Rico - type IV, overprint in back, red
1900 1c Puerto Rico - overprint in black, yellow green
1899 1c on 1c Cuba - Washington, yellow green
1899 Cuba 5c on 5c blue "CUPA"
1899 2c Philippines, red, type IV, double-line watermark USPS
1899 2c on 2c Cuba - Washington, type IV, reddish carmine
1899 2½c on 2c Cuba -Washington, type IV, reddish carmine
1899 3c on 3c Cuba - Jackson, purple
1899 2c Cuba - Royal Palms, carmine
1899 3c Cuba - Allegory, purple
1899 5c Philippines, blue, double-line watermark USPS
1899 1c Philippines, yellow green, double-line watermark USPS
1899 8c Puerto Rico - watermark, perf 12, violet brown
1899 1c Cuba - Statue of Columbus, yellow green
1899 5c Cuba - Ocean Liner, blue
1903-04 1c Philippines, blue green, US #'s 300-310
1899 3c Philippines, purple, double-line watermark USPS
First commemorative stamps of the 20th century.
Columbus stamp promoted the 1893 Chicago World Columbian Exposition.
A single stamp to cover the one-pound air parcel rate in 1952.