Object Number: 209328
Identifier: U-146

Material: Porcelain
Color: White Glaze
Base: Smooth Base
Condition: VNM

Catalog Card Description: Gift of J.H. Bunnell & Co., 20 Park Place, New York, N.Y. February 1, 1901.

Apparently this was part of a lot of 22 insulators.

NIA Notes (courtesy of Elton Gish):

It was made by Pass & Seymour circa 1891-1895. There is only one other known specimen. It is the first threaded wet process porcelain insulator ever made. For more information, look up Crown Jewels articles 3-97-29, 11-89-20, and 9-79-22. These insulators were not made by the usual method of making wet process porcelain -- plunging and trimming. They were cast in the mold by pouring in liquid clay slip -- exactly like J-D made the large uniparts. Consequently, the insulators are extremely finely made and of the highest quality. They were also twice fired.

See p. 135 of Jack Tod's "Porcelain Insulators, Guide Book For Collectors", Third Edition, 1988 for an advertisement for this insulator.