Fun, but this is most likely fake. I.e. this card has not been laying at the postoffice for 100 years. In this case it seems particularly clear: look at the gl

Fun, but this is most likely fake. I.e. this card has not been laying at the postoffice for 100 years. In this case it seems particularly clear: look at the glue markings in the middle of the card. This indicates this postcard probably has been sitting in a collectors' album for quite some time, before someone thought of removing it and pulling a joke. This sort of thing happens all the time by people who post the card after it has been sitting in a collection for some time. Since it is a valid card, the post office will deliver it nonetheless. That's what they do! (Here's a Dutch example: https://www.ad.nl/binnenland/kerstkaart-na-ruim-halve-eeuw-alsnog-bezorgd~aefe43da/ https://www.ad.nl/binnenland/kerstkaart-na-ruim-halve-eeuw-a...) Disclaimer: I checked this with an acclaimed philatelic collector.