lot antique china castor wheels for table or chairs

Lot of four matching iron and white ironstone china castors for restoring lamp tables, plant stands etc. They measure about 1 1/2" across the wheels and have tapered iron shanks. The shanks measure about 2 1/2" long and 1/2" at the base.

One of the wheels has a chip to the rim and a large chip to the center hub.