Vintage milky white opal letter “C” disc keychain

Vintage silver tone marquee / letter / initial “C” keychain. The keychain consists of a silver tone ball chain that has a disc pendant on it. The pendant measures .9 inches by .9 inches and is filled with a swirling, milky opal-like ivory / off-white enamel and the letter “C” in silver tone in the middle of it. The chain measures 4.25 inches long and has a ball and joint enclosure. Some normal wear with use over time, but in great vintage condition!