GS-4250-4499

X Style 101mm - 146mm (4" - 5.75")
GS-4255

GS-4255
GS-4255
Size: 101mm X 69mm (4" x 2.75")
Example in Photo: No Name (O-B) (USA)
Photo Credit: Shaun Kotlarsky
Direct link to this insulator:
ManufacturerInsulator MarkingsColorCountry
No Name (O-B)Light BrownUSA
GS-4265

GS-4265
GS-4265
Size: 107mm X 76mm (4.25" x 3")
Example in Photo: No Name (CP) (Canada)
Photo Credit: Barrett Nicpon
Direct link to this insulator:
ManufacturerInsulator MarkingsColorCountry
CPYellowCanada
UnknownBrownCanada
GS-4287

GS-4287
GS-4287
Size: 120mm X 69mm (4.75" x 2.75")
Example in Photo: BT (England)
Photo Credit: Gene Kingsley
Direct link to this insulator:
ManufacturerInsulator MarkingsColorCountry
British Telecom(Under-glaze Ink) BT / (Year) / A 11BrownEngland
Bullers(Under-glaze Ink) (Logo) / 10646GrayEngland
GS-4300

GS-4300
GS-4300
Size: 127mm X 88mm (5" x 3.5")
Example in Photo: No Name (O-B) (USA)
Photo Credit: Walter Baumgardt
Direct link to this insulator:
ManufacturerInsulator MarkingsColorCountry
No Name (O-B)BrownUSA
GS-4370

GS-4370
GS-4370
Size: 133mm X 88mm (5.25" x 3.5")
Example in Photo: No Name (USA)
Photo Credit: Bill Vincent
Direct link to this insulator:
ManufacturerInsulator MarkingsColorCountry
UnknownLight BrownUSA
GS-4497
GS-4497
GS-4497
Size: 146mm X 101mm (5.75" x 5”)
Example in Photo: No Name (O-B) (USA)
Photo Credit: Bill Sagliano
Direct link to this insulator:
ManufacturerInsulator MarkingsColorCountry
No Name (O-B)BrownUSA