This is a spectacular sterling necklace by Los Castillo. It is bold and makes a statement on the neck. An important piece, it is featured on page 135 of the book William Spratling and the Mexican Silver Renaissance by Penny Morrill. Excellent vintage condition wear from normal use, no abuse. It weighs 74 grams or 2&5/8 ounces (on my kitchen scale). Circa 1944. A beautiful “Art Nouveau” design, it measures 16 inches long, the central piece is 1 ½ inches tall by 6 inches wide. The hallmarks read: LOS CASTILLO TAXCO STERLING MADE IN MEXICO; 368. It is gorgeous in every way. 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. Thank you for your interest.