This is one of three Navajo cuffs that came from the same estate. All of them have a deep gunmetal original patina. People used chemicals to achieve this looks and it still isn’t quite this. I left it as found, but it will polish up. This cuff has two walls and is hollow inside. The outer surface is convex. 

Hallmarked inside and marked sterling. Interior measures 5 1/4” plus the opening of 1 1/8”. For a wrist that measures 6 3/8”. It will not adjust. Measures 21mm wide. Weight: 35.4 grams.