Embossed on Foot "Whittal Tatum Co No.10 (#10 below "A" in Tatum) AND "Made in USA (with "WT" in Inverted Triangle)" 

Used Condition-Near Mint-Only Defect: Small Chip on Middle & Bottom Tier Edges (Pic 5 & 6), Dirt, Scratches & Fleabites

Measures:4 1/8" Tall X 3 5/8" Diameter at Base.

The Whitall Tatum Co. was one of the first glass factories in America (Millville, NJ) and in operation from 1806-1938. Entering the insulator market in 1922 making them for power/communications lines across the country. Glass insulators were eventually phased out for porcelain ones making these a definite collector's item and a piece of History!