Someone suggested they were used to estimate distance which might be true since some modern guns like mp5 have rotating drum sights of same principle. Another

Someone suggested they were used to estimate distance which might be true since some modern guns like mp5 have rotating drum sights of same principle. Another good suggestion was that it was used for knitting, there was a very cool video of this on YouTube somewhere. And the last I like is it’s just a game. I think it was one of the earliest multi-tools and all of these were what it was used for