Westinghouse

The Pittsburg High Voltage Insulator Co. becomes wholly owned by Westinghouse circa 1921/22, production of pintype insulators ceased in 1953.

U 280

U 281's

U 298's

U 283's

U 288's

U# not determined yet, possibly a U 300

Examples of Westinghouse markings

Characteristics: Color(s) --- dark chocolate brown, mottled dark grey, white, dark reddish brown, dark brown, cobalt, dark teal green, light blue, blue, grey Pinhole(s) --- glazed Pinhole Top(s) --- slight dome Fire Rested --- petticoat Wet/Dry Processed --- wet Marking(s) ---see pics above