Bracelets (or more accurately, armlets) such as this example were worn by Naga men, usually above the elbow. It is fashioned from an ivory tusk cross-section.Traditionally, such armlets were worn to indicate success in head-taking. They were the most highly valued of Naga ornaments; only warriors were entitled to wear them (Untracht, 1997, p. 60)
The example here has a flat interior surace but the outer sides are gently concave. The armlet overall has a wonderful golden patina. It is in perfect condition.
See Jacobs (1990, p. 268-9), Untracht (1997, p. 60), and Shilu (2003, p. 25) for similar examples.
References
Borel, F., The Splendour of Ethnic Jewelry: From the Colette and Jean-Pierre Ghysels Collection, Thames & Hudson, 1994.
Jacobs, J., The Nagas: Hill Peoples of Northeast India, Thames & Hudson, 1990.
Shilu, A., Naga Tribal Adornment: Signatures of Status and Self, The Bead Museum, Washington, 2003.
Untracht, O., Traditional Jewelry of India, Thames & Hudson, 1997.