Vintage inlay abalone shell butterfly brooch stamped Alpaca Mexico setting

Vintage inlay abalone shell butterfly brooch stamped Alpaca Mexico setting. Has some patina on back but has not been polished. Style:The butterfly design and use of abalone shell are characteristic of vintage Mexican jewelry, often associated with the mid-20th century. Set in a metal alloy known as Alpaca Silver or German Silver, which is an alloy of copper, nickel, and sometimes zinc.MEASUREMENTS 1.75 x 1.5. WEIGHT: 5. 68 grams total weightHALLMARKS: Mexico AlpacaExcellent Pre-owned Condition, see all the pictures as part of the description. flawless for everyday use. first-class materials and excellent craftsmanship ensure long-lasting durability.