A theatrical or film knife from the early 1900's. Not a cheap prop blade,
this one is meant for use - the blade is diamond cross section, hollow, with blunt edges.
Tempered blade, it doesn't take dents or mark when contacted with another blade
(we tried it with a couple of modern blunts). Wood grip, screw-on pommel. There's a small piece of something
loose inside the hollow blade, you can hear it sliding up and down. However, it's not something integral to the construction
of the blade - there are no breaks or missing parts, it's all quite whole. We're not sure what the slider thing is for.