A vintage or retro boxed male chastity device from the 1970s called the Little Jewel Medieval Male Chastity Preserver, “For the Errant Knight.”
I know with the name, graphics and all I’m supposed to be thinking “Medieval torture device” ~ but for some reason, calling a cock cage a “chastity preserver” reminds me of nautical tales of throwing a life preserver to the proverbial “man overboard.” Of course, a cock cage is exactly what your chronic masturbator needs to keep him from going overboard. …Now I am thinking of The Love Boat‘s Lothario in residence, Doctor Adam Bricker.
Anyway, this vintage cock cage with its punny little hanging jewel appears to be a novelty item and not for for actual use. The seller only notes one specific:
Box measures approximately 6.5″ x 3 3/4″.