The "Dodo-Postcards" watermark is NOT on the actual card – it is an online watermark only.
Castle Rushen Castletown I. O. M. PL23111. Post Card
Castletown. Rushen Castle. Photochrom
Castletown. Castle Rushen. Postcard. 1931
I. O. M. Castletown. Castle Rushen. Photonia Series
Castletown. Castle Rushen. PM. Douglas. 1904
Isle of Man. Castletown. Castle Rushen nd Harbour. Valentine. RP
Castletown. Castle Rushen. Golden Shield. Isle of Man. Multi View. 1994
Isle of Man. Castletown. Castle Rushen. J. Arthur Dixon. Newport. I. W. England