The "Dodo-Postcards" watermark is NOT on the actual card – it is an online watermark only.
The Fort Margate. S. Hildesheimer. No. 601. 1906
The Fort Margate. Hildesheimer. 1910
The Fort Margate. Hildesheimer. No 601
The Fort Margate S Hildesheimer No 601
The Fort Margate S Hildesheimer No 601 1909
The Fort Margate. S. Hildesheimer and Co. Ltd. London and Manchester No. 601