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"SNYDER's PATT. ELECTRIC INSULATOR", 4" wide,
13/8" high, 18 oz, waffle bottom, smooth top cup,
crystal clear. With a hand pointing to some zapping lines, there's no
doubt it's an electrical insulator. Piano insulator?
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Mating glass surfaces are ground; glass ends have concentric ridges,
rubber-hose style. Fluid check of some sort? Came from a power
collection, now it's in an insulator collection, don't mean a thing!
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