It is guaranteed to be Sterling Silver. There is almost no tarnish as it was just professionally polished by my jeweler. It is probably 40-50 years old.It is very thick and heavy. The deep stamp work is impressive when you consider the thickness of the Sterling Silver and is worth examining in the magnified pictures. I believe it will please you... As the Navajo say, "Walk in Beauty". I thank You and look forward to sharing a good experience! "AMERICAN INDIAN JEWELRY I" - Gregory Schaaf. "AMERICAN INDIAN JEWELRY II: A-L". "HALLMARKS OF THE SOUTHWEST"- Barton Wright. THE LITTLE BOOK OF SOUTHWESTERN SILVER - Billie Hougart. "ZUNI JEWELRY" - Theda and Michael Bassman. "ZUNI THE ART AND THE PEOPLE VOLUMES 1-3" - Barbara & Ed Bell- Volume. "KNIFEWING AND RAINBOW MAN IN ZUNI JEWELRY". For reference only Buckle C1. The item "Large Thick Heavy 2.6+ozt NAVAJO CONCHO BELT BUCKLE Stamping Sterling Silver" is in sale since Monday, January 22, 2018. This item is in the category "Jewelry & Watches\Ethnic, Regional & Tribal\Native American\Other Native American Jewelry"." and is located in Tucson, Arizona. This item can be shipped to United States, Canada, United Kingdom, Denmark, Romania, Slovakia, Bulgaria, Czech republic, Finland, Hungary, Latvia, Lithuania, Malta, Estonia, Australia, Greece, Portugal, Cyprus, Slovenia, Japan, China, Sweden, South Korea, Indonesia, Taiwan, Thailand, Belgium, France, Hong Kong, Ireland, Netherlands, Poland, Spain, Italy, Germany, Austria, Israel, Mexico, New Zealand, Philippines, Singapore, Norway, Saudi arabia, United arab emirates, Qatar, Kuwait, Bahrain, Croatia, Malaysia, Chile, Colombia, Costa rica, Bahamas, Uruguay.