I believe the written numbers on back are from pawn. Unmarked or signed but guaranteed to be coin silver or better. This has a hook so it could be worn as a pendant.
Please check with your country? The item "Vintage Fred Harvey Era Pawn Silver Petrified Wood Brooch Pin/Pendant" is in sale since Sunday, November 19, 2017.
This item is in the category "Jewelry & Watches\Vintage & Antique Jewelry\Vintage Ethnic/Regional/Tribal\Southwestern". The seller is "jewelryjoy" and is located in Las Cruces, New Mexico. 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, South africa, Thailand, Belgium, France, Hong Kong, Ireland, Netherlands, Poland, Spain, Italy, Germany, Austria, Russian federation, Israel, Mexico, New Zealand, Philippines, Singapore, Norway, Saudi arabia, United arab emirates, Qatar, Kuwait, Bahrain, Croatia, Malaysia, Brazil, Chile, Colombia, Costa rica.