Here is the porcelain shell for a 4-1/4-inch fog type distribution deadend suspension insulator, light tan or pumpkin glaze color. Unglazed top area where the clevis type metal cap would be cemented to the shell is 2-3/8-inch diameter and has writing on it from a blue ink pen prior to Kiln firing: 703 BE 10/11 The unglazed pin mounting area is 1-1/2-inch diameter hole. The only marking found on the glazed area is: 77 I am thinking that this might have been a Porcelain Products item.