Never seen anything like this porcelain johnny ball insulator with a fuse bolt attached through the center. Marked GEMCO BA 77, Also has unusual protruding lips from the sides of the wire groove presumably to support a wire to secure to the fuse. Measures 3" long x 2.5" wide. 1/2 pinky nail wire groove flake and small surface stress cracks and light rust stains. For additional photos [id=382116936] and [id=382116716].

First email gets this unusual johnny ball insulator for only $80 plus shipping. Thanks