An early 17th-Century Spanish brass part surveying plane table compass theodolite,

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An early 17th-Century Spanish brass part surveying plane table compass theodolite,
signed Signifer, Ferdinand, de Valencia, me fecit. Ao, 1633, the circle engraved in four quadrants, with fixed alidade having two sights, with centre screw and winged nut, contained in the original silk-lined embossed shaped leather case -- 5¼in. (13.3cm.) wide

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