N-TBD: United States (USA)

2” X 3 5/8” (50mm X 90mm)

 

(top) R 5

(crown front) CONTINENTAL

                RUBBER WORKS U.S.A   O-C

(crown back) PATENT PENDING

 

Picture courtesy David Kresz

This insulator has a 5/8" pinhole and no inner skirt.


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