A metal medallion with the Brotherhood of Steel emblem imprinted on it. There are two smaller gears on the left side of the sword. The "wings" are embossed on the medallion, the three gears are raised slightly above the surface, and the sword is set atop it all. The result gives the emblem depth, rather than appearing flat. The medallion is approximately 1/3 the height of a craftable doorway and is completely circular.
The item is found under Wall Decor in the workshop crafting menu.
Learned from plan/recipe
Plan: BoS medallion
BoS medallion (1)