BACKSTAFF BY CHARLES DIGBY Inlaid boxwood label marked "Made by Charles Digby near the Hermitage Stairs London". Ebony frame with tw...

BACKSTAFF BY CHARLES DIGBY London, Circa 1740

Inlaid boxwood label marked "Made by Charles Digby near the Hermitage Stairs London". Ebony frame with two arched boxwood scales, with the earliest types of degree scales. Larger arch with hook-shaped handle. Both arches decorated with tiny stars and flower blossoms. Rich age patina. Length 25.25". Width 14.25".

Backstaffs were invented by English navigator Captain John Davis and were used to measure the altitude of the sun or moon.

Condition: Small age crack to lower right corner. Otherwise good condition with minor surface wear indicative of age and use.

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