The 'patina' on that tool is very similar to what the Eldi/Var tools from that period just...look like. The paint has worn off some surfaces, and the castings were sand (rough finished) wherever they did not need to be machined. Emphasis on the need part. Expect many molding lines to be evident.

Hozan is a similar contemporary. Several tools they make are chrome plated, but the finish is rough...and so is the chrome. They look crappy after several years of service, simply because you cannot really effectively clean rough surfaces on a daily basis (do you have any soft-touch screwdrivers?). A dousing in the parts cleaner usually restores them fairly well.

Eldi was absorbed into various other manufacturers in the 80s (?), so remember that anything you see now, wasn't even state-of-the-art then. There are several chain breakers in the basement of a shop I've worked in from VAR/ELDI, and they are simply crude affairs, compared to even cheap modern tools. That threading (rolling) tool would be a pattern that Cyclo and Hozan copied/refined...and the modern versions still don't look that much better.