ST-4250-4499 Modern compression caps 158mm - 247mm (6.25"

ST-4273

Size: 171mm (6.75")
Example in Photo: Westinghouse (USA)
Photo Credit: Connor Stoehr

Direct link to this insulator:

Manufacturer	Insulator Markings	Cap Markings	Color	Country
Westinghouse	(Incuse) 7298	(Westinghouse Logo) / 602	Redish Brown	USA

ST-4275

Size: 171mm (6.75")
Example in Photo: Teltow (Germany)
Photo Credit: Anonymous

Direct link to this insulator:

Manufacturer	Insulator Markings	Cap Markings	Color	Country
Teltow	(Incuse) (LOGO) T/E L/ T O W/(Date)	(LOGO) T/E L/ T O W/(Year) //	Green	Germany
Teltow	(Incuse) (LOGO) T/E L/ T O W/(Date)	(LOGO) T/E L/ T O W/(Year) //	White	Germany

ST-4275A

Size: 171mm (6.75")
Example in Photo: Richard Ginori (Italy)
Photo Credit: Christian Pagliacci

Direct link to this insulator:

Manufacturer	Insulator Markings	Cap Markings	Color	Country
Richard Ginori	(Under-glaze Ink) Richard Ginori (Year)	S-17800	White	Italy

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:

Manufacturer	Insulator Markings	Cap Markings	Color	Country
O-B		US PAT 11-19-19/11-30-20	Redish Brown	USA

ST-4284

Size: 184mm (7.25")
Example in Photo: Richard Ginori (Italy)
Photo Credit: Christian Pagliacci

Direct link to this insulator:

Manufacturer	Insulator Markings	Cap Markings	Color	Country
Richard Ginori	(Under-glaze Ink) Richard Ginori / (year)	RG // S-1780	Brown	Italy

ST-4286

Size: 190mm (7.5”)
Example in Photo: No Name (Pinco) (USA)
Photo Credit: Connor Stoehr

Direct link to this insulator:

Manufacturer	Insulator Markings	Cap Markings	Color	Country
No Name (Pinco)			Redish Brown	USA

ST-4287

Size: 190mm (7.5")
Example in Photo: Taylor Tunnicliff & Co. (England)
Photo Credit: Gene Kingsley

Direct link to this insulator:

Manufacturer	Insulator Markings	Cap Markings	Color	Country
Taylor Tunnicliff & Co.	(Taylor Tunnicliff Pylon Logo) / Trade Mark / MADE - IN - ENGLAND / Numbers / Date		Brown	England

ST-4287A

Size: 190mm (7.5")
Example in Photo: O-B (USA)
Photo Credit: Jeff Markwart

Direct link to this insulator:

Manufacturer	Insulator Markings	Cap Markings	Color	Country
O-B		(O-B Logo)	Brown	USA

ST-4290

Size: 203mm (8")
Example in Photo: Locke (USA)
Photo Credit: Mid Norris

Direct link to this insulator:

Manufacturer	Insulator Markings	Cap Markings	Color	Country
Locke	(Incuse) LOCKE / (Date)	B2 / LOCKE // 73827 (Keystone Logo)	Brown	USA

ST-4450

Size: 203mm (8")
Example in Photo: CP (Canada)
Photo Credit: Anonymous

Direct link to this insulator:

Manufacturer	Insulator Markings	Cap Markings	Color	Country
CP	(Under-glaze Ink) (CP LOGO) (Year)	(CP LOGO)/15000LB.	Brown	Canada

ST-4475

Size: 228mm (9")
Example in Photo: Lapp (USA)
Photo Credit: Shaun Kotlarsky

Direct link to this insulator:

Manufacturer	Insulator Markings	Cap Markings	Color	Country
Lapp	(Incuse) LAPP/1400/1962 HI-F Logo		Pumpkin Orange	USA
Lapp	(Under-glaze Ink) (Lapp Logo) / LAPP / (Year)	LAPP	Pumpkin Orange	USA
Victor	(Under-glaze Ink) (Victor Logo) / (Year)		Redish Brown	USA

ST-4480

Size: 241mm (9.5")
Example in Photo: Schomburg (Germany)
Photo Credit: Anonymous

Direct link to this insulator:

Manufacturer	Insulator Markings	Cap Markings	Color	Country
Keramische Werke Hermsdorf	(Incuse) (H in triangle logo) / I2237 // E1	(H in triangle logo) // 026	White	Germany
Rosenthal & Co.	(Incuse) C / (Year) / I	(Rosenthal Logo)	Green	Germany
Schomburg	(Schomburg LOGO)		Green	Germany

ST-4480A

Size: 254mm (10")
Example in Photo: Rosentlal & Co. (Germany)
Photo Credit: George Sukhoff

Direct link to this insulator:

Manufacturer	Insulator Markings	Cap Markings	Color	Country
Rosenthal & Co.	(Under-glaze Ink) (Rosenthal Logo) / Selb-Bayern	(R C in a circle with a crown logo)	White	Germany

ST-4485

Size: 241mm (9.5")
Example in Photo: NGK (Japan)
Photo Credit: Bob Scafe

Direct link to this insulator:

Manufacturer	Insulator Markings	Cap Markings	Color	Country
NGK	(Under-glaze Ink) 0 KN M-E / 35 KN TEST / (NKG Logo) / NGK / JAPAN / (year)	(Logo) / 2 20 J	Brown	Japan

ST-4485A

Size: 241mm (9.5")
Example in Photo: NGK (Japan)
Photo Credit: Bob Scafe

Direct link to this insulator:

Manufacturer	Insulator Markings	Cap Markings	Color	Country
NGK	(Under-glaze Ink) 18000LB M-E / 9000LB TEST / (NKG Logo) / NGK / JAPAN / (Year)	1 224 // 2 161	Brown	Japan

ST-4490

Size: 247mm (9.75")
Example in Photo: NGK (Japan)
Photo Credit: Bob Scafe

Direct link to this insulator:

Manufacturer	Insulator Markings	Cap Markings	Color	Country
NGK	(Under-glaze Ink) 25000LB / (NGK Logo) / NGK / (Year) / JAPAN	1 15G (triangle logo) // 2 73	Gray	Japan

ST-4250-4499

Modern compression caps 158mm - 247mm (6.25" - 9.75")