Antique pluming part

This shower head is extra-large and heavy. Made from porcelain. Printed on the side is patented Mad spray Thomas maddocks son's co. The fittings are brass, threads are about 3/4" As old as it is will need new rubber washers/seals to put back to use again. There are no cracks.
4-3/4" largest area, tapers down to two inches

Item # 803