mini holophane type prismatic glass lamp shade for industrial work light or exposed bulb pendant

Early 1900s vintage prismatic glass shade, holophane type, though we didn't find a marking on this one.

It's 6" overall diameter, 2 3/4" tall, 1 1/2" across the fitter. There's a small chip to the fitter rim which will never be seen once the shade is in place.