model B1925, probably a Codman design, 3 by 2 3/8 inches, heavy, finely cast and in untouched original condition. A museum quality object.

Just shy of two inches in both directions, mass 38 grams, opening for belt is 1.5 inches, some scratches as one might expect in an item that's been worn at waist level for the past sixty years but fine overall condition.