U-2-43

(Pony styles with one skirt & wire groove)
U-2
Manufacturer or Marking
No Name (Fred Locke Attic Dig) (USA)

NOTE: in 2008 reference books this was listed as U-2B. The old listings for 2A are now part of U-3
U-2
Size: 53mm X 63mm (2 X 2 ½)
Example in Photo: No Name (Fred Locke Attic Dig) (USA)
Photo Credit: Ken Willick
To directly link to this image copy and paste below URL:
U-3
Manufacturer or Marking
No Name (Fred Locke) (USA)
Fred Locke (USA)
LAPP (USA)
No Name (USA)
O-B (USA)
Size: 58mm X 69mm (2 5/16 X 2 ¾)
Variations: Click on the thumbnail above to see style variations
Variations: Tap on the thumbnail above to see style variations
To directly link to this image copy and paste below URL:
U-3A
Manufacturer or Marking
No Name (Thomas Dry Process) (USA)
LOCKE (USA)
Size: 60mm X 73mm (2 X 2 )
Variations: Click on the thumbnail above to see style variations
Variations: Tap on the thumbnail above to see style variations
To directly link to this image copy and paste below URL:
U-4
Manufacturer or Marking
No Name (Lima) (USA)
Fred Locke (USA)
438B (Fred Locke) (USA)
U-4
Size: 60mm X 76mm (2 x 3)
Example in Photo: Fred Locke (USA)
Photo Credit: Shaun Kotlarsky
To directly link to this image copy and paste below URL:
U-6
Manufacturer or Marking
No Name (Pittsburg) (USA)

NOTE: In 2008 and older reference books, there was a U-7 listed. All listings are now part of U-6 as it was a trimming variation
U-6
Size: 63mm X 66mm (2 ½ x 2 )
Example in Photo: No Name (Pittsburg) (USA)
Photo Credit: Elton Gish
To directly link to this image copy and paste below URL:
U-9
Manufacturer or Marking
No Name (USA)
LAPP (USA)

NOTE: in 2008 and older reference books, there was a U-9A Listed. All listings are now part of U-9
U-9
Size: 53mm X 76mm (2 x 3)
Example in Photo: No Name (USA)
Photo Credit: Jim Frustieri
To directly link to this image copy and paste below URL:
U-10
Manufacturer or Marking
No Name (USA)

NOTE: in 2008 and older reference books, there was a U-10A Listed. All listings are now part of U-10
U-10
Size: 53mm X 69mm (2 x 2 ¾)
Example in Photo: No Name (USA)
Photo Credit: Elton Gish
To directly link to this image copy and paste below URL:
U-11
Manufacturer or Marking
No Name (Illinois 107) (USA)
U-11
Size: 53mm X 69mm (2 x 2 ¾)
Example in Photo: No Name (Illinois 107) (USA)
Photo Credit: Bill Vincent
To directly link to this image copy and paste below URL:
U-11A
Manufacturer or Marking
No Name (USA)
No Name (Thomas) (USA)
G (USA)
U-11A
Size: 60mm X 79mm (2 x 3 ⅛)
Example in Photo: G (USA)
Photo Credit: Mid Norris
To directly link to this image copy and paste below URL:
U-11B
Manufacturer or Marking
No Name (USA)
No Name (Thomas, Dry Process, Carved Top) (USA)
O-B (USA)
Size: 66mm X 85mm (2 x 3 )
Variations: Click on the thumbnail above to see style variations
Variations: Tap on the thumbnail above to see style variations
To directly link to this image copy and paste below URL:
U-11C
Manufacturer or Marking
No Name (Pittsburg) (USA)
No Name (USA)
U-11C
Size: 71mm X 85mm (2 13/16 x 3 ⅜)
Example in Photo: No Name (USA)
Photo Credit: Elton Gish
To directly link to this image copy and paste below URL:
U-12
Manufacturer or Marking
No Name (Pittsburg) (USA)
No Name (USA)
G (Dry Process) (USA)
Westinghouse (USA)
U-12
Size: 57mm X 85mm (2 ¼ x 3 ⅜)
Example in Photo: No Name (USA)
Photo Credit: Shaun Kotlarsky
To directly link to this image copy and paste below URL:
U-12A
Manufacturer or Marking
No Name (Pittsburg) (USA)
U-12A
Size: 57mm X 82mm (2 ¼ x 3 ¼)
Example in Photo: No Name (Pittsburg) (USA)
Photo Credit: Elton Gish
To directly link to this image copy and paste below URL:
U-13
Manufacturer or Marking
No Name (USA)
No Name (Dry Process) (USA)
No Name (Pittsburg) (USA)
Square D (Dry Process) (USA)
Westinghouse (USA)
U-13
Size: 60mm X 82mm (2 x 3 ¼)
Example in Photo: No Name (USA)
Photo Credit: Elton Gish
To directly link to this image copy and paste below URL:
U-14
Manufacturer or Marking
No Name (USA)
U-14
Size: 53mm X 79mm (2 x 3 ⅛)
Example in Photo: No Name (USA)
Photo Credit: Michele Kotlarsky
To directly link to this image copy and paste below URL:
U-14A
Manufacturer or Marking
No Name (USA)
No Name (Square D) (USA)
6109 // 6109 (USA)
U-14A
Size: 60mm X 88mm (2 x 3 ½)
Example in Photo: No Name (Square D) (USA)
Photo Credit: Bob Berry
To directly link to this image copy and paste below URL:
U-14B
Manufacturer or Marking
No Name (P.P. Inc) (USA)
U-14B
Size: 55mm X 92mm (2 3/16 x 3 ⅝)
Example in Photo: No Name (P.P. Inc) (USA)
Photo Credit: Jeff Hogan
To directly link to this image copy and paste below URL:
U-15
Manufacturer or Marking
No Name (Pittsburg) (USA)
No Name (Dry Process) (USA)
No Name (USA)
Findlay (USA)
Illinois (109) (USA)
Knox (USA)
O-B (USA)
U-15
Size: 60mm X 88mm (2 x 3 ½)
Example in Photo: No Name (USA)
Photo Credit: Elton Gish
To directly link to this image copy and paste below URL:
U-15A
Manufacturer or Marking
No Name (USA)
U-15A
Size: 63mm X 95mm (2 ½ x 3 ¾)
Example in Photo: No Name
Photo Credit: Shaun Kotlarsky
To directly link to this image copy and paste below URL:
U-15B
Manufacturer or Marking
No Name (Dry Process) (USA)
U-15B
Size: 60mm X 88mm (2 x 3 ½)
Example in Photo: No Name (Dry Process) (USA)
Photo Credit: Elton Gish
To directly link to this image copy and paste below URL:
U-17
Manufacturer or Marking
No Name (Thomas, MLOD, Dry Process, Carved Top) (USA)
No Name (Thomas, Dry Process) (USA)
No Name (Thomas, MLOD, Dry Process) (USA)
U-17
Size: 57mm X 82mm (2 ¼ X 3 ¼)
Example in Photo: No Name (USA)
Photo Credit: Bill Plunkett
To directly link to this image copy and paste below URL:
U-17A
Manufacturer or Marking
Consumers Insulator Co. (USA)
U-17A
Size: 60mm X 82mm (2 x 3 ¼)
Example in Photo: Consumers Insulator Co. (USA)
Photo Credit: Elton Gish
To directly link to this image copy and paste below URL:
U-18
Manufacturer or Marking
No Name (Thomas, MLOD, Dry Process, Carved Top) (USA)
No Name (Thomas, Dry Process, Carved top) (USA)
No Name (MLOD, Dry Process) (USA)
No Name (Thomas, MLOD, Dry Process) (USA)
U-18
Size: 60mm X 82mm (2 x 3 ¼)
Example in Photo: No Name (USA)
Photo Credit: Jim Frustieri
To directly link to this image copy and paste below URL:
U-18A
Manufacturer or Marking
No Name (Dry Process) (USA)
U-18A
Size: 57mm X 76mm (2 ¼ x 3)
Example in Photo: No Name (Dry Process) (USA)
Photo Credit: Elton Gish
To directly link to this image copy and paste below URL:
U-19
Manufacturer or Marking
No Name (USA)
No Name (Lima) (USA)
O-B (USA)
U-19
Size: 65mm X 85mm (2 9/16 x 3 )
Example in Photo: O-B (USA)
Photo Credit: Elton Gish
To directly link to this image copy and paste below URL:
U-21
Manufacturer or Marking
No Name (USA)
No Name (Thomas) (USA)
COOK (10) (USA)
Illinois Map (USA)
Knox (USA)
U-21
Size: 60mm X 82mm (2 x 3 ¼)
Example in Photo: No Name (USA)
Photo Credit: Shaun Kotlarsky
To directly link to this image copy and paste below URL:
U-22
Manufacturer or Marking
No Name (Dry Process) (USA)
U-22
Size: 60mm X 66mm (2 x 3 ⅝)
Example in Photo: No Name (Dry Process) (USA)
Photo Credit: Elton Gish
To directly link to this image copy and paste below URL:
U-26
Manufacturer or Marking
No Name (USA)
No Name (Pittsburg) (USA)
Findlay (USA)
G.P.Co. (109) (USA)
Illinois Map (USA)
Westinghouse (USA)
U-26
Size: 60mm X 82mm (2 x 3 ¼)
Example in Photo: No Name (USA)
Photo Credit: National Insulator association
To directly link to this image copy and paste below URL:
U-28
Manufacturer or Marking
No Name (Mold lines) (USA)
No Name (Thomas 1012) (USA)
No Name (USA)
U-28
Size: 60mm X 73mm (2 x 2 )
Example in Photo: No Name (Mold lines) (USA)
Photo Credit: Elton Gish
To directly link to this image copy and paste below URL:
U-29
Manufacturer or Marking
No Name (USA)
U-29
Size: 63mm X 66mm (2 ½ x 2 )
Example in Photo: No Name (USA)
Photo Credit: Elton Gish
To directly link to this image copy and paste below URL:
U-30
Manufacturer or Marking
No Name (Lima)

NOTE: In 2008 and older reference books, This was listed as U-30A. U-30, U-30A and U-30B are now all consolidated in to U-30 as they are just variations in the trimming process.
U-30
Size: 63mm X 63mm (2 ½ x 2 ½)
Example in Photo: No Name (Lima)
Photo Credit: Shaun Kotlarsky
To directly link to this image copy and paste below URL:
U-31
Manufacturer or Marking
P.P. Inc. (USA)
U-31
Size: 57mm X 83mm (2 ¼ x 3 ¼)
Example in Photo: P.P. Inc. (USA)
Photo Credit: Charles Robinson
To directly link to this image copy and paste below URL:
U-31A
Manufacturer or Marking
No Name (USA)
U-31A
Size: 57mm X 79mm (2 ¼ x 3 ⅛)
Example in Photo: No Name (USA)
Photo Credit: Elton Gish
To directly link to this image copy and paste below URL:
U-32
Manufacturer or Marking
No Name (USA)
Square D (Dry Process) (USA)

NOTE: In 2008 and older reference books, there was a U-32A Listed. It was just a height variation of U-32 so has been removed.
U-32
Size: 60mm X 82mm (2 x 3 3 ¼)
Example in Photo: Square D (Dry Process) (USA)
Photo Credit: Shaun Kotlarsky
To directly link to this image copy and paste below URL:
U-33
Manufacturer or Marking
No Name (Dry Process) (USA)
CD 33
Size: 60mm X 88mm (2 x 3 ½)
Example in Photo: No Name (Dry Process) (USA)
Photo Credit: Jim Frustieri
To directly link to this image copy and paste below URL:
U-35
Manufacturer or Marking
No Name (Lima) (USA)
CD 35
Size: 60mm X 69mm (2 x 2 ¾)
Example in Photo: No Name (Lima) (USA)
Photo Credit: Elton Gish
To directly link to this image copy and paste below URL:
U-36
Manufacturer or Marking
No Name (Pittsburg, MLOD) (USA)
U-36
Size: 63mm X 69mm (2 ½ x 2 ¾)
Example in Photo: No Name (Pittsburg, MLOD) (USA)
Photo Credit: Elton Gish
To directly link to this image copy and paste below URL:
U-39
Manufacturer or Marking
No Name (USA)
No Name (Thomas) (USA)
Fred Locke (USA)
'GLEN' (Fred Locke) (USA)

NOTE: Pre 2008 reference books there was a U-38 and 39. Both are the same insulator. The difference in appearance is from the trimming operation. Both are now known as U-39
Size: 57mm X 66mm (2 ¼ x 2 )
Variations: Click on the thumbnail above to see style variations
Variations: Tap on the thumbnail above to see style variations
To directly link to this image copy and paste below URL:
U-39A
Manufacturer or Marking
No Name (Lima) (USA)
U-39A
Size: 63mm X 82mm (2 ½ x 3 ¼)
Example in Photo: No Name (Lima) (USA)
Photo Credit: Ken Willick
To directly link to this image copy and paste below URL:
U-40
Manufacturer or Marking
No Name (USA)
Fred Locke (USA)
U-40
Size: 53mm X 63mm (2 x 2 ½)
Example in Photo: No Name (USA)
Photo Credit: Elton Gish
To directly link to this image copy and paste below URL:
U-40A
Manufacturer or Marking
No Name (Lima) (USA)
U-40A
Size: 57mm X 63mm (2 ¼ x 2 ½)
Example in Photo: No Name (Lima) (USA)
Photo Credit: Elton Gish
To directly link to this image copy and paste below URL:
U-41
Manufacturer or Marking
No Name (Concentric Rings on Dome) (USA)
U-41
Size: 57mm X 88mm (2 ¼ x 3 ½)
Example in Photo: No Name (Concentric Rings on Dome) (USA)
Photo Credit: Elton Gish
To directly link to this image copy and paste below URL:
U-42
Manufacturer or Marking
No Name (USA)
No Name (Macomb? Dry Process) (USA)
MACOMB (Dry Process) (USA)
Square D (Dry Process) (USA)

NOTE: in 2008 and older reference books, there is a U-42A and U-42B. They are now consolidated in to the U-42 listing as they are just trimming variations.
U-42
Size: 55mm X 88mm (2 3/16 X 3 ½)
Example in Photo: MACOMB (Dry Process) (USA)
Photo Credit: Elton Gish
To directly link to this image copy and paste below URL:
U-42A
Manufacturer or Marking
No Name (Pittsburg) (USA)

NOTE: In 2008 and older reference books, There is a U-42C and U-42D. They now are consolidated in to U-42A
Size: 63mm X 85mm (2 ½ X 3 )
Variations: Click on the thumbnail above to see style variations
Variations: Tap on the thumbnail above to see style variations
To directly link to this image copy and paste below URL:
U-43
Manufacturer or Marking
No Name (Macomb? Dry Process) (USA)
U-43
Size: 53mm X 82mm (2 X 3 ¼)
Example in Photo: No Name (Macomb? Dry Process) (USA)
Photo Credit: Elton Gish
To directly link to this image copy and paste below URL:

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