U-104-180

(Telephone & telegraph styles)
U-104
Manufacturer or Marking
No Name (Pittsburg) (USA)
U-104
Size: 60mm X 85mm (2 x 3 ⅜)
Example in Photo: No Name (Pittsburg) (USA)
Photo Credit: James Lindsey
To directly link to this image copy and paste below URL:
U-105
Manufacturer or Marking
No Name (USA)
U-105
Size: 63mm X 92mm (2 ½ x 3 ⅝)
Example in Photo: No Name
Photo Credit: National Insulator association
To directly link to this image copy and paste below URL:
U-106
Manufacturer or Marking
No Name (USA)
U-106
Size: 60mm X 101mm (2 x 4)
Example in Photo: No Name
Photo Credit: National Insulator association
To directly link to this image copy and paste below URL:
U-106A
Manufacturer or Marking
No Name (Pittsburg) (USA)
U-106A
Size: 63mm X 101mm (2 ½ x 4)
Example in Photo: No Name (Pittsburg) (USA)
Photo Credit: Fred Collier
To directly link to this image copy and paste below URL:
U-106B
Manufacturer or Marking
AM. TEL & TEL Co. (Brookfield) (USA)
U-106B
Size: 57mm X 88mm (2 ¼ x 3 ½)
Example in Photo: AM. TEL & TEL Co. (Brookfield) (USA)
Photo Credit: Elton Gish
Digitally repaired by: Shaun Kotlarsky
To directly link to this image copy and paste below URL:
U-107
Manufacturer or Marking
No Name (Fred Locke) (USA)
No Name (Locke 42) (USA)
U-107
Size: 63mm X 92mm (2 ½ x 3 ⅝)
Example in Photo: No Name (Fred Locke) (USA)
Photo Credit: Elton Gish
To directly link to this image copy and paste below URL:
U-108
Manufacturer or Marking
No Name (Fred Locke) (USA)
No Name (Thomas 1033) (Dry Process) (USA)
No Name (Thomas, Dry Process, Carved Top) (USA)

NOTE: In 2008 and older reference books, there was a U-109 listed. All listings are now part of U-108
Size: 63mm X 92mm (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-110
Manufacturer or Marking
No Name (Pittsburg, MLOD) (USA)
U-110
Size: 73mm X 114mm (2 x 4 ½)
Example in Photo: No Name (Pittsburg, MLOD) (USA)
Photo Credit: Elton Gish
To directly link to this image copy and paste below URL:
U-113
Manufacturer or Marking
No Name (Pittsburg) (USA)
Size: 63mm X 101mm (2 ½ x 4)
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-114
Manufacturer or Marking
No Name (Pittsburg) (USA)
Size: 69mm X 114mm (2 ¾ x4 ½)
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-117
Manufacturer or Marking
No Name (USA)
G (Dry Process)(USA)
U-117
Size: 69mm X 104mm (2 ¾ x 4 )
Example in Photo: No Name (USA)
Photo Credit: Shaun Kotlarsky
To directly link to this image copy and paste below URL:
U-117A
Manufacturer or Marking
No Name (Dry Process, MLOD) (USA)
U-117A
Size: 76mm X 107mm (3 x 4 ¼)
Example in Photo: No Name (Dry Process, MLOD) (USA)
Photo Credit: Elton Gish
To directly link to this image copy and paste below URL:
U-118
Manufacturer or Marking
No Name (USA)
O-B (USA)
U-118
Size: 69mm X 101mm (2 ¾ x 4)
Example in Photo: O-B (USA)
Photo Credit: National Insulator association
To directly link to this image copy and paste below URL:
U-119
Manufacturer or Marking
No Name (Pittsburg 30) (USA)
No Name (USA)
U-119
Size: 69mm X 104mm (2 ¾ x 4 )
Example in Photo: No Name (Pittsburg 30) (USA)
Photo Credit: Elton Gish
To directly link to this image copy and paste below URL:
U-120
Manufacturer or Marking
No Name (Pittsburg 31, MLOD) (USA)
U-120
Size: 69mm X 104mm (2 ¾ x 4 )
Example in Photo: No Name (Pittsburg 31, MLOD) (USA)
Photo Credit: Bill Rohde
To directly link to this image copy and paste below URL:
U-121
Manufacturer or Marking
No Name (Pittsburg) (USA)
U-121
Size: 69mm X 98mm (2 ¾ x 3 )
Example in Photo: No Name (Pittsburg) (USA)
Photo Credit: Matt Grayson
To directly link to this image copy and paste below URL:
U-126
Manufacturer or Marking
CP (Canada)
No Name (USA)
P.P. INc. (USA)

NOTE: Canadian units are also known as U-2212 in the “Worldwide Porcelain Insulators Chart”
U-126
Size: 76mm X 63mm (3 x 2 ½)
Example in Photo: No Name (USA)
Photo Credit: Unknown
To directly link to this image copy and paste below URL:
U-128
Manufacturer or Marking
No Name (USA)
U-128
Size: 76mm X 69mm (3 x 2 ¾
Example in Photo: No Name (USA)
Photo Credit: Matt Grayson
To directly link to this image copy and paste below URL:
U-129
Manufacturer or Marking
No Name (USA)
P.P. Inc. (USA)
U-129
Size: 76mm X 63mm (3 x 2 ½)
Example in Photo: No Name (USA)
Photo Credit: Mid Norris
To directly link to this image copy and paste below URL:
U-132
Manufacturer or Marking
No Name (Pittsburg) (USA)
C.N.R. (Dry Process) (Canada)
C.N.R. (Pittsburg) (USA) - For Export to Canada
C.P.R (Pittsburg) (USA) - For Export to Canada
C.P.R. (Dry Process) ((Canada)

NOTE: Canadian units are also known as U-1131 in the “Worldwide Porcelain Insulators Chart”
U-132
Size: 76mm X 63mm (2 x 3 )
Example in Photo: C.N.R. (Pittsburg) (USA) - For Export to Canada
Photo Credit: Elton Gish
To directly link to this image copy and paste below URL:
U-133
Manufacturer or Marking
No Name (Lima) (USA)
LIMA, N.Y. (USA)
U-133
Size: 63mm X 76mm (2 ½ x 3)
Example in Photo: No Name (Lima) (USA)
Photo Credit: Ken Willick
To directly link to this image copy and paste below URL:
U-133A
Manufacturer or Marking
No Name (Lima) (USA)
U-133A
Size: 69mm X 88mm (2 ¾ x 3 ½)
Example in Photo: No Name (Lima) (USA)
Photo Credit: Ken Willick
To directly link to this image copy and paste below URL:
U-133B
Manufacturer or Marking
No Name (Pittsburg?) (USA)
U-133B
Size: 53mm X 73mm (2 ½ x 2 )
Example in Photo: No Name (Pittsburg?) (USA)
Photo Credit: FredCollier
To directly link to this image copy and paste below URL:
U-134
Manufacturer or Marking
KNOX (USA)
U-134
Size: 66mm X 107mm (2 x 4 ¼)
Example in Photo: KNOX (USA)
Photo Credit: Bob Berry
To directly link to this image copy and paste below URL:
U-138
Manufacturer or Marking
No Name (USA)
Illinois Map (USA)
J-D (USA)
U-138
Size: 62mm X 101mm (2 ¾ x 4)
Example in Photo: Illinois Map (USA)
Photo Credit: Charles Robinson
To directly link to this image copy and paste below URL:
U-141
Manufacturer or Marking
Pass & Seymour (USA)
U-141
Size: 76mm X 101mm (3 x 4)
Example in Photo: Pass & Seymour (USA)
Photo Credit: Elton Gish
Digitally repaired by: Shaun Kotlarsky
To directly link to this image copy and paste below URL:
U-143
Manufacturer or Marking
No Name (Thomas, Dry Process, Carved Top) (USA)
U-143
Size: 73mm X 104mm (2 x 4 )
Example in Photo: No Name (Thomas, Dry Process, Carved Top) (USA)
Photo Credit: Elton Gish
To directly link to this image copy and paste below URL:
U-143A
Manufacturer or Marking
No Name (Thomas, Dry Process, Carved Top) (USA)
No Name (Parker Catalog 117) (USA)
No Name (USA)

NOTE: in 2008 and older reference books, there was a U-142, It is identical to U-143A so listings are now part of U-143A
U-143A
Size: 73mm X 107mm (2 x 4 ¼)
Example in Photo: No Name (Thomas, Dry Process, Carved Top) (USA)
Photo Credit: Elton Gish
To directly link to this image copy and paste below URL:
U-143B
Manufacturer or Marking
Thomas (Dry Process) (USA)
U-143B
Size: 73mm X 101mm (2 x 4)
Example in Photo: Thomas (Dry Process) (USA)
Photo Credit: Matt Grayson
To directly link to this image copy and paste below URL:
U-144
Manufacturer or Marking
No Name (New Lexington, Flat inner Skirt) (USA)
U-144
Size: 76mm X 101mm (3 x 4)
Example in Photo: No Name (New Lexington, Flat inner Skirt) (USA)
Photo Credit: Elton Gish
To directly link to this image copy and paste below URL:
U-145
Manufacturer or Marking
CP (Canada)
No Name (Pittsburg) (USA)
Illinois (USA)

NOTE: Canadian units are also known as U-1140 in the “Worldwide Porcelain Insulators Chart”
U-145
Size: 76mm X 101mm (3 x 4)
Example in Photo: No Name (Pittsburg) (USA)
Photo Credit: Elton Gish
To directly link to this image copy and paste below URL:
U-146
Manufacturer or Marking
Pass & Seymour (USA)
U-146
Size: 76mm X 107mm (3 x 4 ¼)
Example in Photo: Pass & Seymour (USA)
Photo Credit: Elton Gish
To directly link to this image copy and paste below URL:
U-146A
Manufacturer or Marking
Pass & Seymour (USA)
U-146A
Size: 76mm X 107mm (3 x 4)
Example in Photo: Pass & Seymour (USA)
Photo Credit: Elton Gish
To directly link to this image copy and paste below URL:
U-148
Manufacturer or Marking
No Name (Pittsburg) (USA)
N.A.T.CO. (Pittsburg) (USA)
SOO (Pittsburg) (USA)
U-148
Size: 76mm X 104mm (3 x 4 ⅛)
Example in Photo: No Name (Pittsburg) (USA)
Photo Credit: Elton Gish
To directly link to this image copy and paste below URL:
U-149
Manufacturer or Marking
No Name (Pittsburg) (USA)
U-149
Size: 76mm X 111mm (3 x 4 )
Example in Photo: No Name (Pittsburg) (USA)
Photo Credit: Elton Gish
To directly link to this image copy and paste below URL:
U-149A
Manufacturer or Marking
No Name (Pittsburg) (USA)
F (Findlay) (USA)
Findlay 192 (USA)
U-149A
Size: 79mm X 114mm (3 x 4 ½)
Example in Photo: No Name (Pittsburg) (USA)
Photo Credit: Elton Gish
To directly link to this image copy and paste below URL:
U-150
Manufacturer or Marking
No Name (USA)
O-B (USA)
U-150
Size: 79mm X 104mm (3 x 4 ⅛)
Example in Photo: O-B (USA)
Photo Credit: Bill Ostrander
To directly link to this image copy and paste below URL:
U-150A
Manufacturer or Marking
No Name (USA)
U-150A
Size: 82mm X 104mm (3 ¼ x 4 ⅛)
Example in Photo: No Name (USA)
Photo Credit: Elton Gish
To directly link to this image copy and paste below URL:
U-151
Manufacturer or Marking
No Name (USA)
No Name (New Lexington) (USA)
No Name (Pittsburg) (USA)
U-151
Size: 82mm X 107mm (3 ¼ x 4 ¼)
Example in Photo: No Name (USA)
Photo Credit: Ben Kirsten
To directly link to this image copy and paste below URL:
U-151A
Manufacturer or Marking
No Name (Dry Process, Embossed Circle in Pinhole, Davidson & Stevenson) (USA)
No Name (Dry Process, Davidson & Stevenson) (USA)
U-151A
Size: 82mm X 107mm (3 ¼ x 4 ¼
Example in Photo: No Name (Dry Process, Davidson & Stevenson) (USA)
Photo Credit: Steve Coffman
To directly link to this image copy and paste below URL:
U-152
Manufacturer or Marking
No Name (USA)
COOK 129 (USA)
CPR (Canada)
Findlay (USA)
G.P.Co (USA)
G.P.Co. // MP (USA)
MP (USA)

NOTE: CPR (Canada) Units should also have a U-Number in the “Worldwide Porcelain Insulators Chart” range as U-1-999 are US only styles. No “Worldwide Porcelain Insulators” U-Number is yet available for this unit.
U-152
Size: 82mm X 111mm (3 ¼ x 4 )
Example in Photo: COOK 129 (USA)
Photo Credit: Elton Gish
To directly link to this image copy and paste below URL:
U-152A
Manufacturer or Marking
No Name (Dry Process) (USA)
U-152A
Size: 82mm X 111mm (3 ¼ x 4 )
Example in Photo: No Name (Dry Process) (USA)
Photo Credit: Elton Gish
To directly link to this image copy and paste below URL:
U-152B
Manufacturer or Marking
No Name (USA)
U-152B
Size: 82mm X 111mm (3 ¼ x 4 )
Example in Photo: No Name (USA)
Photo Credit: Bill Rohde
To directly link to this image copy and paste below URL:
U-153
Manufacturer or Marking
No Name (USA)
U-153
Size: 85mm X 111mm (3 x 4 )
Example in Photo: No Name (USA)
Photo Credit: Walt Baumgardt
To directly link to this image copy and paste below URL:
U-154
Manufacturer or Marking
No Name (Pittsburg) (USA)
POSTAL (Pittsburg) (USA)
U-154
Size: 88mm X 107mm (3 ½ x 4 ¼)
Example in Photo: POSTAL (Pittsburg) (USA)
Photo Credit: Elton Gish
To directly link to this image copy and paste below URL:
U-157
Manufacturer or Marking
No Name (USA)
KNOX (USA)
U-157
Size: 82mm X 114mm (3 ¼ x 4 ½)
Example in Photo: KNOX (USA)
Photo Credit: Fred Collier
To directly link to this image copy and paste below URL:
U-158
Manufacturer or Marking
No Name (USA)
No Name (Thomas) (USA)
U-158
Size: 85mm X 101mm (3 x 4)
Example in Photo: No Name (Thomas) (USA)
Photo Credit: Dave Kingston
To directly link to this image copy and paste below URL:
U-159
Manufacturer or Marking
No Name (Thomas 1057) (USA)
No Name (USA)
U-159
Size: 82mm X 114mm (3 ¼ x 4 ½)
Example in Photo: No Name (USA)
Photo Credit: Fred Collier
To directly link to this image copy and paste below URL:
U-160
Manufacturer or Marking
No Name (USA)
Illinois (USA)
Illinois Map (222) (USA)
U-160
Size: 82mm X 127mm (3 ¼ x 5)
Example in Photo: Illinois Map (222) (USA)
Photo Credit: Larry Baumann
To directly link to this image copy and paste below URL:
U-164
Manufacturer or Marking
No Name (USA)

NOTE: in 2008 and older reference books, there was a U-164A. All listings are now part of U-164 as it is just a manufacturing variation.
Size: 92mm X 117mm (3 x 4 )
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-166
Manufacturer or Marking
COOK (USA)

NOTE: U-166 is for narrow skirt angle units. U-166 is only found in COOK made insulators.
U-166
Size: 88mm X 101mm (3 ½ x 4)
Example in Photo: COOK (USA)
Photo Credit: Matt Grayson
To directly link to this image copy and paste below URL:
U-167
Manufacturer or Marking
No Name (USA)
G.P.Co. (USA)

NOTE: U-167 is for units with straight sides, wide wire groove
Size: 92mm X 107mm (3 x 4 ¼)
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-168
Manufacturer or Marking
No Name (Pittsburg) (USA)
No Name (Trenton Porcelain Co) (USA)

NOTE: U-168 is for Units with straight sides, angle of crown and skirt divergent, They have larger groove then U-169.
U-168
Size: 92mm X 101mm (3 x 4)
Example in Photo: No Name (Trenton Porcelain Co) (USA)
Photo Credit: Fred Collier
To directly link to this image copy and paste below URL:
U-169
Manufacturer or Marking
THOMAS (USA)
No Name (Thomas, Wet Process) (USA)
No Name (Thomas, Dry Process) (USA)

NOTE: U-169 is for Units with straight sides, angle of crown and skirt divergent
U-169
Size: 92mm X 101mm (3 x 4)
Example in Photo: No Name (USA)
Photo Credit: Matt Grayson
To directly link to this image copy and paste below URL:
U-170
Manufacturer or Marking
B141 (Embossed circle in top of pinhole) (USA)
COOK (USA)
No Name (USA)
Triangle M (USA)

NOTE: U-170 is for units that have skirt and crown at the same angle.
U-170
Size: 92mm X 101mm (3 x 4)
Example in Photo: No Name (USA)
Photo Credit: Matt Grayson
To directly link to this image copy and paste below URL:
U-171
Manufacturer or Marking
.M (USA)
No Name (USA)
No Name (Pittsburg) (USA)
Illinois (224) (USA)
(Pittsburg date code) (Pittsburg) (USA)
Triangle M (USA)
106 (Scratched on top) (Pittsburg) (USA)
Victor R = ∞ (USA)

NOTE: U-171 is for all units with curved skirts and crowns. Top is a different slant then the skirt.
ALSO NOTE: In 2008 and older reference books, there was a U-171A listed. Listing are now part of U-171.
U-171
Size: 92mm X 101mm (3 x 4)
Example in Photo: No Name (USA)
Photo Credit: National Insulator Association
To directly link to this image copy and paste below URL:
U-172
Manufacturer or Marking
No Name (Pittsburg) (USA)
J1926 (Pittsburg) (USA)

NOTE: U-172 is for all units with curved skirts and crowns.
U-172
Size: 92mm X 101mm (3 x 4)
Example in Photo: No Name (Pittsburg) (USA)
Photo Credit: Dave Kingston
To directly link to this image copy and paste below URL:
U-173
Manufacturer or Marking
No Name (Pittsburg) (USA)
No Name (USA)
PATENT APLD FOR / PINCO (USA)
Pinco (USA)

NOTE: In 2008 and older reference books, there is a U-174 listed. It is now merged with U-173 and it is the same insulator.
U-173
Size: 95mm X 98mm (3 x 4 ¼)
Example in Photo: No Name (USA)
Photo Credit: Bob Berry
To directly link to this image copy and paste below URL:
U-175
Manufacturer or Marking
Locke R= ∞ (USA)
U-175
Size: 114mm X 101mm (4 x 4)
Example in Photo: Locke R= ∞ (USA)
Photo Credit: Robin Harrison
To directly link to this image copy and paste below URL:
U-177
Manufacturer or Marking
No Name (Locke) (USA)
U-177
Size: 92mm X 101mm (3 x 4)
Example in Photo: No Name (Locke) (USA)
Photo Credit: Shaun Kotlarsky
To directly link to this image copy and paste below URL:
U-179
Manufacturer or Marking
No Name (Pittsburg) (USA)
P.R.R. (Pittsburg) (USA)
U-179
Size: 82mm X 101mm (3 ¼ x 4)
Example in Photo: No Name (Pittsburg) (USA)
Photo Credit: Steve Coffman
To directly link to this image copy and paste below URL:
U-180
Manufacturer or Marking
No Name (O-B) (USA)
O-B (USA)
U-180
Size: 82mm X 101mm (3 ¼ x 4)
Example in Photo: O-B (USA)
Photo Credit: Shaun Kotlarsky
To directly link to this image copy and paste below URL:
U-180A
Manufacturer or Marking
O-B (USA)

NOTE: In 2008 and older reference books, this is listed as U-180B.
The difference between the U-180 and the U-180A is the U-180 A has a larger groove. Example in Variation photo also is a newer production run as it is Recess-embossed (r-e) and not the classic O-B Embossing.
Size: 82mm X 101mm (3 ¼ x 4)
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-180B
Manufacturer or Marking
No Name (Dry Process) (USA)
U-180B
Size: 82mm X 104mm (3 ¼ x 4 )
Example in Photo: No Name (Dry Process) (USA)
Photo Credit: Paul Birner
To directly link to this image copy and paste below URL: