Lovingly crafted by hand, it is a touching memento of the days when Harry was very much in the Royal fold.
But this birthday card also includes a hint of a future that no one could ever have imagined for the young royal.
It is decorated with a heart in the colours of the American flag and the words ‘Love Harry’ also includes a stars-and-stripes motif.
It is thought that the card, which is due to go on sale at Dominic Winter Auctioneers on Wednesday, dates from 1987 or 1988.
The auction house’s website states: ‘Nicki, the recipient of the card, was given this birthday card by Harry when he was three or four. Diana told her Harry had made it specially (but possibly with some assistance from Diana).’
The auction house stated that Diana told the recipient of the card that Harry had made it specially. Pictured: King Charles, Diana, William and Harry
Lovingly crafted by hand, it is a touching memento of the days when Harry was very much in the Royal fold
It adds that it is made from ‘folded dark grey paper with colour paper cut-outs of circles, diamonds, hearts etc, pasted to front cover and inside pages, and ‘Stars and Stripes’ transfer capital letters reading ‘LOVE HARRY’ neatly pasted to right inside page’.
The card, which has an estimated value of between £1,000 and £1,500, is one of several items of royal memorabilia up for sale.
Other lots include a 1987 signed Christmas card featuring Charles, Diana, William and Harry, plus a 1990 letter signed by Diana expected to fetch up to £1,000.
It was written to Anne-Marie of Denmark, the wife of Constantine II, the last king of Greece, who died earlier this year.
A 1992 letter to Reg Spinney – who served as a bodyguard to William and Harry – is tipped to fetch up to £3,000.
Diana wrote: ‘I did so want you to know how deeply we’ve all appreciated your marvellous (& no doubt challenging!) work during the last five years. William & Harry have been more than fortunate to have you by their side.’