This is a gorgeous sterling silver necklace and earrings designed by noted Taxco silversmith Antonio Castillo. The “Pre Hispanic Serpent” design of this necklace and earrings is rare and wonderful. It measures 19 ½” long; each serpent head is 4” long by 1” wide. There are three pieces of the necklace that make up another necklace without the serpent heads. Thus you are buying two necklaces for the price of one. The hook clasp is simple and efficient. The earrings are screw backs in good working order. Circa 1940s the necklace and earrings are in excellent vintage condition, wear from normal use, and no abuse. Hallmarks read: LOS CASTILLO TAXCO STERLING 344 (maybe the design number) as shown in photo. Antonio Castillo was an apprentice at Las Delicias, William Spratling's silver taller, from 1931 to 1939 when he and his brothers left to form their own company: "Los Castillo". He was a contemporary of Hector Aguilar, Antonio Pineda, Fred Davis and Margot de Taxco was his wife. Email or call with questions.