"Found at rummage sale. About the size of pen in length. Tip on end is spring loaded but doesn’t act like a punch. Cork like ball that spins. Engraving on side includes a sun with squiggles. Novelty or functional?"
"It’s a massage/sensory/accupressure spring needle rolle"
...film container. No mine has this particular imprint on the housing. For pressure you install AP or frog type device under, and pressurize with AT.
They are used all over to prevent damage to ships in general.
We use yokohama fenders while repairing the regular fenders on the jetty.