Vintage modernist Popowski Mexican sterling silver and obsidian circular pin with copper and brass fish and circles, married into the silver face plate, cut out circle and fish shapes backed by obsidian. A striking piece displaying interesting design and craftsmanship. Fully marked on back with stamps "Popowoski Made in Mexico DF Sterling HT 925" and eagle 20. See Hougart "The Little Book of Mexican Silver Trade and Hallmarks", pages 53 & 112 as well as Warmans Jewelry, 3rd edition, page 256. Diameter 12 1/4 ". Very good condition with no damage. Sold as is.