The "Dodo-Postcards" watermark is NOT on the actual card – it is an online watermark only.
No. 60. Princess Diana. Another 21. st. Birthday Portrait by Snowdon. Prescott Pickup. Sovereign Series No. 4. Royal Family. Sovereign Pictorial A Series of Album Collections
H. R. H. The Princess Anne. A 21 st Birthday Portrait from Photograph by Norman Parkinson. J. Arthur Dixon. 1972
Lichfield. Princess Anne 30th Birthday Portrait. Prescott Pickup. Sovereign Pictorial. Sovereign Series. No. 2
Lichfield. Princess Anne. 30 th Birthday Portrait. Prescott Pickup. Sovereign Series No. 52
London. National Portrait Gallery. Diana Princess of Wales. David Bailey. NPG. England. P3997. British Philatelic Bureau Edinburgh Diana 1998 Stamp
A Joyous 21st Birthday. Twenty one years your coming of age and you have turned the page of another year. 790. RP. Greeting Card. 1929
21st Birthday of the Princess of Wales. Veldale. Kidderminster. Eng
Portraits of Diana. Princess of Wales. Bradford Exchange