Here's a an uncommon insulator that was made by Sediver for use in Chile. This style insulator is on display at the Sediver museum in France.

Embossed: EIV (front) with the large "S" sandblasted on the side skirt indicating it was used during WWII. Also 06/U-15 (reverse skirt).

Has pinky nail flake on dome and teeny tic mark on base of inner skirt. First email gets this hard to find insulator for only $90 plus shipping. Thanks!