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Mariner's Davis Type Quadrant (Backstaff)
Category: Marine
SubType: Instruments
Origin: America-USA
Era: 18th Century
Height: 23 inches
Width: 13 inches
Ivory Inlaid Rosewood & Boxwood Mariner's Davis Type Quadrant (Backstaff). A rare and desirable mariner's quadrant, with rosewood frame, boxwood scales and sights, whale ivory inlays and brass and copper pins and fittings; inscribed on an ivory plaque; Made for M: Joseph White (thought to be a Maine sea captian); probably made in Newburyport. One of the earliest types of celestial navigation instruments made and used in Colonial America. Length 23", Width 13". Circa 1755.

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