It's hard to say friend. I have bought a lot of very neat stuff over the years. It depends on when it was. The original owner retired 5 years ago so if it was longer then 5 years it wasn't to me.
Probably a grease filled die. Any time you have machinery your gonna have grease and grime in the area. Every now&then, this grime gets into dies and clog them until they fall out or cleaned...