This is one of three cuff bracelets  that came from the same estate. All of them have a deep gunmetal original patina.( People use chemicals to achieve this looks and it still isn’t quite this.) I left it as found with scratches and all, but it will polish up. This cuff is hollow inside with a convex shape. . 

Hallmarked inside. Not Navajo. .  Marked sterling. Interior measures 5 1/2” plus the opening of 1 3/8”. For a wrist that measures 6 7/8”   Measures 1/2” wide. Weight: 27 grams.