U-2503-2598

U-2531
Manufacturer or Marking
HESCHO (Germany, Found in Canada)
U-2531
Size: 98mm X 76mm (3 x 3)
Example in Photo: Hescho
Photo Credit: Shaun Kotlarsky
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U-2571
Manufacturer or Marking
No Name (Canada)
U-2571
Size: 95mm X 79mm (3 ¾ x 3 ⅛)
Example in Photo: No Name (Canada)
Photo Credit: Shaun Kotlarsky
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U-2574
Manufacturer or Marking
No Name (Canada)
Allied Insulators (Logo) (England)
U-2574
Size: 95mm X 85mm (3 ¾ x 3 ⅜)
Example in Photo: Allied Insulators (Logo) (England)
Photo Credit: Gene Kingsley
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U-2582
Manufacturer or Marking
No Name (Canada)
CP (Canada)

NOTE: USA units are U-601
U-2582
Size: 95mm X 76mm (3 ¾ x 3)
Example in Photo: CP (Canada)
Photo Credit: Shaun Kotlarsky
To directly link to this image copy and paste below URL:
U-2582
Notes: Trimming Variation
Example in Photo: No Name (Canada)
Photo Credit: Shaun Kotlarsky