antique vintage solid brass shower tub drain grill cover

Vintage old architectural plumbing, solid brass drain cover for a cast iron shower or tub. This measures about 2 1/8" across the top flange, 1 1/4" across the drain hole pattern, 1/2" high and 1 1/2" across on the inner flange. There is an about 1/4" threaded hole in the center to screw this on.

This shower drain cover is in very nice condition.