Kings Key finder 1950's coral agate color clip

1950's or so Mid century key ring - called a King's Key Finder. Inside the clip is stamped: "King's Key Finder, Los Angeles, Reg. U.S. Pat. Off." It is about 2 5/8 inches long (not counting the keg ring chain) and just over an inch across. The key ring section is about 2 1/2 inches long.