A fine silver swing arm protractor, signed on the reverse Joshua Kirby Inv. Oct. 5 1765, with scales divided 10°-180°,III-XII, A5-50B at intervals of 5, the swinging arm decorated with vines in fitted shagreen case(case damaged)

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A fine silver swing arm protractor, signed on the reverse Joshua Kirby Inv. Oct. 5 1765, with scales divided 10°-180°,III-XII, A5-50B at intervals of 5, the swinging arm decorated with vines in fitted shagreen case(case damaged)

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