
The founding committee of the Red Cross, Geneva, 1863
The stamp is simply one big mistake. the stamp would have been better off just celebrating the International Red Cross and left it at that. But to celebrate it on the 88th anniversary? Well that was the mistake, the stamp declares in big bold letters that the Red Cross was founded in 1864. Yet, back in 1952 it was well documented (you only had to ask the Red Cross) that the International Red Cross was founded in 1863, in Geneva, Switzerland. On the true anniversary of the founding of the International Red Cross, in 1963, the Bureau got it right and put the correct date on the stamp, see examples below.

The 1952 stamp showing the incorrect date of 1864

The 1963 stamp showing the correct date of 1863