My dad and I found one of those in an old cabinet this past Summer. It was exactly like that one, minus the keys... and pretty clean for looking so old... and "dirty"... lol!
My mom kinda got pissed when I showed her "what dad found"... ha, ha... I'm terrible.
I bought a couple of those key chains a few years ago at a flea market and took them to my bowling league. My drunk buddies really really had a hilarious time with them.
I think those are made by Screwum & Howe?
I bought one of those for my Dad asa gag birthday gift back in the 80's. I loved that thing!
Thanks for the post (no pun intended).
-MM-