Source Unknown Sterling Silver Amethyst Tear Drop Pendant Marked 925 WM CZ

Sterling silver teardrop pendant with a cubic zirconia amethyst center stone. Marked 925 WM CZ. I have not been able to identify the hallmark. the bale opening is large enough to accommodate several size necklaces. Probably vintage. Approximate measurements shown in photos. In great pre-owned condition. necklace, drop, pendant, gemstone,