May 4, 2024
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On the right stamp, moon rock. One of the cool stamps I ordered! On a swap card to the USA.
The right stamp is great, showing gravitation waves. One of the older ones I got from Ebay. I like these scientific stamps sooo much better than the cartoon ones! I’m using these on a card to the USA. :)
How cool, a Slovakian stamp about oncology! That’s nice, I’d love some more science related stamps here as well.
SK-146437