Catalog Pages for

Nail Knobs and Split Knobs

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Electric Supply & Equipment Co. catalog No. 10 (c. 1915)

Fobes Supply Co. catalog from 1924.

Northern Electric Co. (Canada) catalog from 1917.

Manhattan Electrical Supply Co. catalog No. 13 (circa 1907) 

Electrical World dated May 6, 1893.  See style R-33 for a photo of the only known specimen.

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