large old brown ceramic round insulators for architectural or farm

Lot of seven assorted old and antique vintage round pottery or ceramic insulators with lag screw bases. These are from an old farm estate and were being used as for wiring around the farm and gates and corners on electric fences. One insulator is marked Knox-Bodd.

These insulators are mostly about 2 1/8" in diameter and 2" wide with smears of old white paint, but one of them is smaller.