Antique Whitall Tatum Co., No 1 Glass Insulator

An antique Whitall Tatum No 1 Glass Insulator. Circa 1910s, Made in USA. Cool teal, greenish blue glass. The glass insulator is in very good vintage condition with no chips or cracks. The glass insulator measures approximately 4 inches tall, 3 5/8 inches in diameter at bottom rim.