The Lucy Show - Season 5 - Episode 5 - Lucy and the Ring a Ding Ring

Lucy tries on an expensive ring Mr. Mooney had made for his wife, it looks like the bank manager won't be able to give his spouse the anniversary present - it gets stuck on Lucy's finger.

Creators: Bob Carroll Jr., Madelyn Davis, Bob Schiller
Starring: Lucille Ball, Gale Gordon, Vivian Vance, Jimmy Garrett, Sid Gould, Ralph Hart