[SunkenCiv]

You know those "ritual purpose" explanations? Well, that appears to me to be valid here -- just an amulet or charm for the superstitious. If not that, then a gambling throw. Either one would make sense since most of these have been found in old Roman military contexts. But by all means, enjoy this video, it's excellent, and I've set the time index to skip the opening ad.

[Leaning Right]

I know what that is. It’s a device to used steal votes for the Roman Senate. Interestingly enough, Democrats use an updated version of this device to steal votes today.

As the ancient Romans used to say: Furtum verum est.
(that’s my tagline in Latin)

[Roccus]

First thing that came to mind, and this is ONLY a thought, could it have been a jig used for field repair of chainmail