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. Some tiny nibbles in the area of the buffing likely of factory origins. Otherwise only light use marks and scattered factory bubbles. Easily VNM++.

These are aerial spacer insulators to keep power lines separated from each other over large canyons. This example was used in Argentina. This is 1 of 2 known and my last one.

First email gets it for the reduced price of only $150 plus shipping. Thanks!