Your new/old roll crimper is a Lyman tool. I think they were made in the 1950's

From what I can see, I'd probably just clean the rust with a wire wheel. But if the rust is more extensive on the collets, you might want to try using Evapo-Rust or a solution of feed store molasses and water. Evapo-Rust is a bit faster and the molasses method is considerably cheaper. Another option would be the electrolysis method of rust removal.

Originally Posted by Geoff Roznak
The NRA has proven itself unreliable and corrupt.
Period.