Here's a rarely seen straw tinted glass insulator marked PYREX BRAND (front) 3658 (reverse). Measures 13" long. The flared ends are 1 3/8" wide, with one end factory buffed down to remove excess glass after cut with glass cutters. Looks to have one small scuff mark above the embossing, otherwise only light use marks and scattered factory bubbles. From ICON conversations, these are aerial spacer insulators to keep power lines separated from each other over large canyons. This example was used in Argentina.

Never seen one offered for sale before. First email gets it for $185 plus shipping. Thanks