This modernist design by famed Mexican silver designers Los Castillo are made of sterling silver with brass, copper, onyx and either turquoise or malachite inlay.
These cufflinks measure approx: 7/8" x 7/8", and are in good condition for their age, with a bit of wear on the stone inlay. They are stamped with the Los Castillo Mexico stamp, the eagle dating them to midcentury, Sterling & made in Mexico.
