The "Dodo-Postcards" watermark is NOT on the actual card – it is an online watermark only.
Giant Causeway. The Grand Cave. Valentines Series. 1912
Giants Causeway. The Grand Cave. Valentine and Sons ltd. Phototype
Giants Head. Giants Causeway. Valentines Series
Horizontal Pillars. Giants Causeway. Valentines Series
Giants Gate. Giants Causeway. Valentines Series
The Steucans. Giants Causeway. Valentines Series
The Honeycomb. Giants Causeway. Valentines. RP
13827. Giants Causeway. The Grand Cavern. Judges. 1956