in another topic the Zambretti codes were mentioned and @storm_tracker shared some nice pictures of this tiny instrument (the pocket version is only 5.5 cm) made by Negretti and Zambra in 1915. Just for fun I recreated a wooden version (with the help of storm_tracker by sending even more pictures when I asked him for it). It is a redesign, that doesn’t need a transparent layer.
I used a laser to cut and engrave the disks. You can see it here. Zambretti forecaster - YouTube
(if you didn’t subscribe yet and like to see what I’m going to make next, please do hit that button, only 380 subscribers, but want to reach 1000)
If you want to make one yourself, I made an instructable https://www.instructables.com/Negretti-Zambra-Pocket-Weather-Forecaster/