Pittsburg 5" x 5" trolley insulator [NOT FINISHED]

[Trade Journal]

Publication: Electric Railway Journal

New York, NY, United States
p. 95

[not finished]

Keywords:Porcelain Insulator : Trolley Insulator : Pittsburg High Voltage Insulator Company
Researcher notes: 
Supplemental information: 
Researcher:Elton Gish
Date completed:November 4, 2012 by: Elton Gish;