$25 Everlast ball hook swivel, with platform - Duvall, WA Craigslist

[paranday]

Don't know the vintage on the ball hook, but for them that like them maybe worth a look,

http://seattle.craigslist.org/est/spo/4008796025.html

[Dutchman]

It's a late production, the infamous "flaking" metal ones. The chrome plating on the male half is the tip off.

[paranday]

In that case, please avoid. Your eye doctor will thank you.