Details
An 18th-Century brass surveying graphometer,
signed on the limb Pigeon a Lyon, the protractor scale divided 0-180/0-180, the compass box attached to the frame by four mounting screws, enclosed by an engraved wreath supported by engraved scrolls, the limb and alidade with four sights, the underside fitted with a staff mounting with universal ball-and-socket joint, in the original embossed leather-covered wood case (defective, old tears, some leather loss, hinges defective) -- 11in. (28cm.) wide
See Colour Illustration
signed on the limb Pigeon a Lyon, the protractor scale divided 0-180/0-180, the compass box attached to the frame by four mounting screws, enclosed by an engraved wreath supported by engraved scrolls, the limb and alidade with four sights, the underside fitted with a staff mounting with universal ball-and-socket joint, in the original embossed leather-covered wood case (defective, old tears, some leather loss, hinges defective) -- 11in. (28cm.) wide
See Colour Illustration
Sale room notice
This Lot has a revised estimate of 1500 - 2000.