Here's a rarely seen station post insulator used indoors to insulate electrical machinery and apparatus. These are typically found made of porcelain. This one is made in clear glass and found in Spain. Unmarked. Measures 3 5/8" tall x 2 1/2" wide.

Has 1 1/2" thin base bruise, pumpkin seed size wear mark, 4 teeny flakes/nicks. These were fitted with metal caps at the factory which likely produced the "pumpkin seed size wear mark". Here's a photo of typical station post insulators made in porcelain [id=601486173].

First email gets this tough insulator for only $50 plus 8.40 shipping. But it with the midnight blue example and get free shipping on both! Thanks!