U-1131: Canada
2 3/4" X 3 3/4" (71mm X 94mm)
(dome incuse) C P R {Pittsburg High Voltage}
Picture courtesy Bob Berry |
2 5/8" X 3 3/4" (67mm X 95mm)
(skirt inkstsmp)
Picture courtesy Barrett Nicpon |
2 5/8" X 3 3/4" (67mm X 95mm)
No markings
Picture courtesy Barrett Nicpon |
2 5/8" X 3 3/4" (67mm X 95mm)
No markings
Picture courtesy Barrett Nicpon |
2 3/4" X 3 3/4" (67mm X 95mm)
(dome incuse) C.N.R.
Picture courtesy Barrett Nicpon |
2 3/4" X 3 7/8" (67mm X 95mm)
(dome inkstamp) C.P.R.
Picture courtesy Bob Berry |
2 3/4" X 3 7/8" (67mm X 95mm)
(dome inkstamp) T.& N.O.R.Y.
Picture courtesy Bob Berry |
2 7/8" X 3 3/4" (70mm X 92mm)
(dome inkstamp) C.N.R.
Picture courtesy Bob Scafe |
Note -- U-1131A & U-1132 have been consolidated to U-1131 July 2020
U number assignment from Worldwide Porcelain Insulators by Marilyn Albers & Jack Tod.