This is the earlier version of the design in iron or steel that has been given a blue patination then silver wire is inlaid to form the design of a starry night, and a single moonstone representing the full moon reflecting on the waters below. These blued steel pieces are extremely rare, and this brooch design is the only one of this version that I've seen in my 45+ years in the field. This one is about 1.5" diameter, and it's marked "Chato Castillo" and design number "101".

This is a later version, probably the early 1950s, and the blued steel is set in a sterling silver frame. Otherwise, almost the same design, with a single moonstone representing the full moon reflecting on the waters below. The design is silver wire inlaid into a blued steel base. Marked at back "Los Castillo Taxco Hecho en Mexico" and design number '101'. Measures about 1.5" diameter and 17 grams total. The only one of this version of the design that I have seen ever! Very rare design!

Two versions of this very rare design by Chato Castillo for Los Castillo in Taxco circa late 1940s.

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