Related to the previous post, I’ve also found this collection of stamp designs. There are a lot here from the Mid Century Modern aesthetic too, including this beautiful Israeli stamp celebrating the Hebrew Writers Guild. I love the irregularity of the numerals, the complex detail in the design, and the pleasing visual metaphor:
In case you’re wondering, yes, I do like a lot of the Israeli stamp designs, but it’s not an exclusive thing; I like stamps from Poland, travel brochures, emergency banknotes and commercial packaging too.