I found this at a flea market a bit ago but haven't done anything with it yet, including clean it. Then last night I saw a FB post on Richard Binder's page that said Esterbrook cartridge pens CX100 will take a Platinum converter. Is this that pen? The pics on a google search did not match this pen. It has a twist cap.
I don't have a platinum converter, but they're easy enough for me to get. Be really keen if I could get this baby working again. Any idea if a Platinum converter would go on whatever kind of Esterbrook this is?