b61-563
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Item no.: 166449761324
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b61-563 GRAVITY INCLINOMETER. Duffy Patent. Extremely rare example of the level patented in 1887 by Edward Duffy of Pawtucket, RI. 7" cast iron base with 2-3/8" diameter silver dial with delicate pointer and very detailed fine divisions. Marked "Pat. Apld For." Traces of red and gold pinstriping on the top. The actual level shown on pages 215-16 of Rosebrook, and one of only a couple of examples known. From the collection of Don Rosebrook. Fine 2000-4000
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