The "Dodo-Postcards" watermark is NOT on the actual card – it is an online watermark only.
Submarine Mining in the British Navy. 6136 Cale and Polden LTD. The Nelson Series
Latest Addition to the British Navy. The Sub Marine. J. Welch
15. Zeebrugge. Belgian memorial to the crew of the British submarine. C. 3. A. Dohmen. Bruxelles
H. M. Submarine M Class. 1918. Model representing one of the thee British submarines built to carry in. gun. The Science Museum. London. No. 74
HMS Shark. British Submarine. Photo
British Submarine H. M. S. Sturgeon. Valentines. RP
HMS Odin. N84. British Submarine. Photo
HMS Cachalot. N83. British submarine. Photo