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galvanometer scale and spotlight

galvanometer scale and spotlight

Leeds & Northrup Company
circa 1920
mounting arm for scale and telescope of wall-type reflecting galvanometer

mounting arm for scale and telescope of wall-type reflecting galvanometer

Leeds & Northrup Company
circa 1920
reflecting galvanometer scale

reflecting galvanometer scale

Leeds & Northrup Company
circa 1925
scale for reflecting galvanometer with telescope ring mount

scale for reflecting galvanometer with telescope ring mount

Leeds & Northrup Company
circa 1905
scale for reflecting galvanometer with telescope ring mount

scale for reflecting galvanometer with telescope ring mount

Leeds & Northrup Company
circa 1905
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