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A rare triple action parallel rule by Hezzanith, Field's rule / Hill's Patent.
Boxwood and brass parallel rule, used for chart navigation. Circa 1880's. Length: 21 inches / 53 cm.Â
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A rare triple action parallel rule by Hezzanith, Field's rule / Hill's Patent.
Boxwood and brass parallel rule, used for chart navigation. Circa 1880's. Length: 21 inches / 53 cm.Â