Hammered Ring by Maison Martin Margiela Line 11.  From the men's collection, signet-style ring with textured surface detail; part of the Casting series, designed after personal accessories from around the world.

Flat signet shape / Subtle, slightly oxidized finish / Hammered, multifaceted texture / Ring is 1.5cm at widest point / Interior engraved detail / Color: Silver / 100% Brass / Box included / Made in Italy.