I see holes.
Small ones.
Maybe the one with small holes were for fine threads?
I would have guessed they are gauges of some sort (for metal rods or wooden dowls) that also determined how straight they were by dropping it at the top and seeing if it hit the ground. If it didn’t catch in a kink or bend, it was straight enough. The knobs keep the faces from wearing.
But that doesnt explain the 20-sider with the tiny holes.
Part of me wonders if colored or marked discs weren’t inserted behind the smaller holes via the largest one and the thing thrown in some sort of outdoor gambling game. That doesn’t make much sense for the 20-sider, either.
I need to see the videos showing how it was used for knitting.
He needs holes!
/Seinfeld
The odd one has not only holes, but even more holes (80?). It is also a different shape, divided by triangles like a 20-sider rather than a pentagonal 12-sider.