Could use some assistance with this one. It is just a bit under 3-3/4" wide at the base by a bit over 3-1/2" high. It is embossed on top with a logo and a long number (056072754194). Smooth, medium brown.

This one of a few interesting porcelain insulators I was lucky enough to have in my possession for just a few days before delivering them to their new owner. I liked them so much, I decided to photograph some of them and post them for reference.