The photo I posted on Christmas Day was of the card sent to Mary (my great aunt) 100 years ago.
I also have a card sent 30 years later, during the next war. This one was sent from my father to his parents and sister.
Sending physical cards is falling out of fashion, for very obvious and valid reasons, especially with friends and family being scattered across the globe. However, I think there is still something special about receiving cards and we have ours displayed in various parts of the house.