Here are two slightly different foreign (Polish?) porcelain insulators with markings I can't find elsewhere. Both are in mint condition, and one is a bit whiter than the other. I tried to draw the markings as best I could. The one on the left is incuse while the marking on the right piece is recess-embossed. The piece on the left has a white plastic (nylon?) insert that I can't get out with just my fingers. Withdrawn.