Mid-Century Los Castillo Taxco Metales Casados Mosaic Cup

This is a vintage Mexican art metal cup or jigger, likely produced by the renowned workshop Los Castillo in Taxco, Mexico. The piece utilizes the 'Metales Casados' (married metals) technique, where various metals such as brass, copper, and silver-tone alloys are fused together without solder. The exterior is further embellished with a vibrant stone mosaic inlay featuring lapis lazuli (blue), malachite or dark stone (black), and possible mother-of-pearl or white onyx (white). The design depicts a stylized, modernist figure—possibly a musician or harvester—rendered in mixed metal brass tones against a blue and white mosaic background. The central figure has a reddish copper-granulated texture on the torso. The cup features a polished brass rim and a stepped footed base. The craftsmanship displays the high-quality handwork synonymous with mid-20th-century Taxco metalwork, specifically the period between 1950 and 1970. Regarding condition, the piece shows a heavy golden patina and surface oxidation on the brass, which is consistent with age. There are no obvious missing stone tesserae in the mosaic from this angle, though the metal shows light surface scratches and minor pitting. The interior appears as a tarnished brass or silver-plate finish over copper.

I have examined the digital representations of this Mid-Century Los Castillo Metales Casados cup. The piece exhibits the hallmark complexities of the Taxco workshop, specifically the 'married metals' technique pioneered by the Castillo brothers. The integration of brass and copper with crushed stone mosaic—utilizing lapis lazuli and malachite—suggests a production date between 1950 and 1965. The condition appears consistent with vintage metalwork; the heavy patina and oxidation on the brass and copper elements are desirable signs of age, though the minor pitting and surface scuffing noted on the base slightly temper the value. Unlike mass-produced tourist ware of the era, the precision of the mosaic tesserae and the modernist figural composition point toward an authentic Los Castillo origin. The market for Taxco metalwork remains robust, with collectors driving demand for Los Castillo specifically due to their innovative metallurgical techniques. Comparable pieces of this size and complexity typically realize between $400 and $700 at decorative arts auctions. Factors increasing value include the multi-colored stone palette; factors decreasing value include the lack of a visible 'Hecho en Mexico' or workshop hallmark in the imagery. Limitations: This appraisal is based on visual data only. A physical inspection is required to verify the 'Los Castillo' stamp, confirm the absence of modern adhesive repairs in the mosaic, and test the metal composition. To finalize authentication, I would seek provenance records or evidence of the specific design number usually stamped on the underside.