Mid-late 20th century. Four rings including: one with William Spratling mark, ca. 1940 and 'Taxco 980', set with round cabochon amethyst, Sz 7; one crossover ring marked '925' with cabochon amethyst at each end, Sz 6; one incised silver ring with William Spratling mark, ca. 1940-46, 'Made in Mexico' and 'Spratling Silver', Sz 6.5; together with unmarked ring featuring oval cantera opal, Sz 7. Total weight 42gr.