Metallographic studies have been made of archaeological artifacts recovered from an excavation of a civilization which existed in La Compania, Los Rios Province, Ecuador South America, in the period 700-1519 A.D. All the artifacts are described as collar buttons, and most were copper-silver alloys. The studies primarily were conducted using optical metallographic methods. Interpretations of the microstructures and the joints between the various parts of the artifacts revealed significant information regarding the methods used to fabricate the artifacts. Some speculations are offered regarding the specific manufacturing methods employed by the ancient metalsmiths.