ST-4250-4499

Modern compression caps 158mm - 247mm (6.25" - 9.75")
ST-4273
ST-4273
ST-4273
Size: 171mm (6.75")
Example in Photo: Westinghouse (USA)
Photo Credit: Connor Stoehr
Direct link to this insulator:
ManufacturerInsulator MarkingsCap MarkingsColorCountry
Westinghouse(Incuse) 7298(Westinghouse Logo) / 602Redish BrownUSA
ST-4275
ST-4275
ST-4275
Size: 171mm (6.75")
Example in Photo: Teltow (Germany)
Photo Credit: Anonymous
Direct link to this insulator:
ManufacturerInsulator MarkingsCap MarkingsColorCountry
Teltow(Incuse) (LOGO) T/E L/ T O W/(Date)(LOGO) T/E L/ T O W/(Year) //GreenGermany
Teltow(Incuse) (LOGO) T/E L/ T O W/(Date)(LOGO) T/E L/ T O W/(Year) //WhiteGermany
ST-4275A
ST-4275A
ST-4275A
Size: 171mm (6.75")
Example in Photo: Richard Ginori (Italy)
Photo Credit: Christian Pagliacci
Direct link to this insulator:
ManufacturerInsulator MarkingsCap MarkingsColorCountry
Richard Ginori(Under-glaze Ink) Richard Ginori (Year)S-17800WhiteItaly
ST-4280
ST-4280
ST-4280
Size: 177mm (7")
Example in Photo: O-B (USA)
Photo Credit: Anonymous
Patent: 1,321,078 - Patented Nov. 11, 1919
Patent:
1,360,352 - Patented Nov. 30, 1920
Direct link to this insulator:
ManufacturerInsulator MarkingsCap MarkingsColorCountry
O-BUS PAT 11-19-19/11-30-20Redish BrownUSA
ST-4284
ST-4284
ST-4284
Size: 184mm (7.25")
Example in Photo: Richard Ginori (Italy)
Photo Credit: Christian Pagliacci
Direct link to this insulator:
ManufacturerInsulator MarkingsCap MarkingsColorCountry
Richard Ginori(Under-glaze Ink) Richard Ginori / (year)RG // S-1780BrownItaly
ST-4286
ST-4286
ST-4286
Size: 190mm (7.5”)
Example in Photo: No Name (Pinco) (USA)
Photo Credit: Connor Stoehr
Direct link to this insulator:
ManufacturerInsulator MarkingsCap MarkingsColorCountry
No Name (Pinco)Redish BrownUSA
ST-4287
ST-4287
ST-4287
Size: 190mm (7.5")
Example in Photo: Taylor Tunnicliff & Co. (England)
Photo Credit: Gene Kingsley
Direct link to this insulator:
ManufacturerInsulator MarkingsCap MarkingsColorCountry
Taylor Tunnicliff & Co.(Taylor Tunnicliff Pylon Logo) / Trade Mark / MADE - IN - ENGLAND / Numbers / DateBrownEngland
ST-4287A
ST-4287A
ST-4287A
Size: 190mm (7.5")
Example in Photo: O-B (USA)
Photo Credit: Jeff Markwart
Direct link to this insulator:
ManufacturerInsulator MarkingsCap MarkingsColorCountry
O-B(O-B Logo)BrownUSA
ST-4290
ST-4290
ST-4290
Size: 203mm (8")
Example in Photo: Locke (USA)
Photo Credit: Mid Norris
Direct link to this insulator:
ManufacturerInsulator MarkingsCap MarkingsColorCountry
Locke(Incuse) LOCKE / (Date)B2 / LOCKE // 73827 (Keystone Logo)BrownUSA
ST-4450
ST-4450
ST-4450
Size: 203mm (8")
Example in Photo: CP (Canada)
Photo Credit: Anonymous
Direct link to this insulator:
ManufacturerInsulator MarkingsCap MarkingsColorCountry
CP(Under-glaze Ink) (CP LOGO) (Year)(CP LOGO)/15000LB.BrownCanada
ST-4475
ST-4475
ST-4475
Size: 228mm (9")
Example in Photo: Lapp (USA)
Photo Credit: Shaun Kotlarsky
Direct link to this insulator:
ManufacturerInsulator MarkingsCap MarkingsColorCountry
Lapp(Incuse) LAPP/1400/1962 HI-F LogoPumpkin OrangeUSA
Lapp(Under-glaze Ink) (Lapp Logo) / LAPP / (Year)LAPPPumpkin OrangeUSA
Victor(Under-glaze Ink) (Victor Logo) / (Year)Redish BrownUSA
ST-4480
ST-4480
ST-4480
Size: 241mm (9.5")
Example in Photo: Schomburg (Germany)
Photo Credit: Anonymous
Direct link to this insulator:
ManufacturerInsulator MarkingsCap MarkingsColorCountry
Keramische Werke Hermsdorf(Incuse) (H in triangle logo) / I2237 // E1(H in triangle logo) // 026WhiteGermany
Rosenthal & Co.(Incuse) C / (Year) / I(Rosenthal Logo)GreenGermany
Schomburg(Schomburg LOGO)GreenGermany
ST-4480A
ST-4480A
ST-4480A
Size: 254mm (10")
Example in Photo: Rosentlal & Co. (Germany)
Photo Credit: George Sukhoff
Direct link to this insulator:
ManufacturerInsulator MarkingsCap MarkingsColorCountry
Rosenthal & Co.(Under-glaze Ink) (Rosenthal Logo) / Selb-Bayern(R C in a circle with a crown logo)WhiteGermany
ST-4485
ST-4485
ST-4485
Size: 241mm (9.5")
Example in Photo: NGK (Japan)
Photo Credit: Bob Scafe
Direct link to this insulator:
ManufacturerInsulator MarkingsCap MarkingsColorCountry
NGK(Under-glaze Ink) 0 KN M-E / 35 KN TEST / (NKG Logo) / NGK / JAPAN / (year)(Logo) / 2 20 JBrownJapan
ST-4485A
ST-4485A
ST-4485A
Size: 241mm (9.5")
Example in Photo: NGK (Japan)
Photo Credit: Bob Scafe
Direct link to this insulator:
ManufacturerInsulator MarkingsCap MarkingsColorCountry
NGK(Under-glaze Ink) 18000LB M-E / 9000LB TEST / (NKG Logo) / NGK / JAPAN / (Year)1 224 // 2 161BrownJapan
ST-4490
ST-4490
ST-4490
Size: 247mm (9.75")
Example in Photo: NGK (Japan)
Photo Credit: Bob Scafe
Direct link to this insulator:
ManufacturerInsulator MarkingsCap MarkingsColorCountry
NGK(Under-glaze Ink) 25000LB / (NGK Logo) / NGK / (Year) / JAPAN1 15G (triangle logo) // 2 73GrayJapan