Unusual Ohio Brass item #3

By Jim Sinsley; posted November 19, 2009

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Recently acquired this item and have never seen another. I know it's made by Ohio brass, is patented in 1901 and is some sort of a spool. I would like to know how it was used, could it be a MINE insulator?, has any one ever seen a pin for it? Lou Hall? approximate value? Thanx for any input

Quick replys identifies this as : King's patent # 667,882 Mine insulator

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