1950s Oval man's gold starburst tie tac diamond chip mechanical back vintage jewelry ll1421

This tie tac is not marked but looks to be gold plated. It is in perfect condition. The tie tac has a starburst face with what is probably a diamond chip in the center. It is tiny but sparkles. The back has the slider, chain and post. It is 5/8 inch by 1/2 inch.