The "Dodo-Postcards" watermark is NOT on the actual card – it is an online watermark only.
Fishing Cone. West Thumb Bay. Yellowstone National Park. 1962
Grand Canyon of the Yellowstone from Artists Point. Yellowstone National Park. No 8125. B. Hopkins
Yellowstone National Park. The Storm and the Sun On Old Faithful Geyser. Hamilton Stores
White Dome Geyser. TWA Services. Yellowstone National Park. The Continental Card. Mike Roberts
Yellowstone National Park. The Celebrated Old Faithful Geyser. Haynes Studios. Curteichcolor. 1966
Wyoming. Old Faithful Geyser. In Yellowstone. National Park. T. W. A. Services. Mike Roberts. The Continental Card
Wyoming. Old Faithful Geyser in Yellowstone National Park. TWA Services. Mike Roberts
Yellowstone National Park. Tower Falls. Hamilton Stores. William S. Keller