The ingenious perpetual flip calendar from the 1920s

boing
1

Originally published at: https://boingboing.net/2018/03/02/the-ingenious-perpetual-flip-c.html

…

3 Likes
2

Totally going to 3dPrint this. Any votes for color combos?

2 Likes
3

The green of your avatar circle with bright neon orange numbers!

1 Like
4

Guess I need a better avatar :rofl:

1 Like
5

I love these! I have a few now from the Flea Market.
So cool to see the patent .

image
922FB2B9-4262-4875-88C1-E196AD912148.jpeg3024×3024 1.84 MB

1 Like
6

This topic was automatically closed after 5 days. New replies are no longer allowed.