The "Dodo-Postcards" watermark is NOT on the actual card – it is an online watermark only.
On Guard at Whitehall. RHHR Limited
Changing Guard. Whitehall. London. 4. RP
Royal Horse Guards changing Guard. Whitehall. C. 523. RP
Royal Horse Guards. Changing Guard. Whitehall. London. 72306. Valentines. RP. 1953
The Arrival of the New Guard. Whitehall. Dixon
London. Changing of Guard. Whitehall. C 2163. Judges
London. A Life Guard Whitehall. Judges. C. 2164