It already has been thanks to someone reading Steve's sig.

I've seen different styles, ranging in sizes from 12 to about 24 inches long.

On the far right,.. is that where the action is?.. or does the chain cut?

That looks like an antique saw for cutting open a skull.

This is what I could find online.

Skull Saw (1830s-60s)This hand-cranked saw's blades were used to cut through sections of the skull, allowing for access by other instruments.

You're up, Herb.