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Lot 522
A LATE 17TH /EARLY 18TH CENTURY FRENCH "BUTTERFIELD" DIAL octagonal with an adjustable sprung folding gnomon, with bird-beak pointer, incised & filled with four concentric hour scales, the reverse incised & filled with European latitudes (from Madrid at 40 degrees through to Copenhagen at 56 degrees), signed "N,.Brion a Paris"*, (original fitted case), Paris c.1700; 2.85" (7.3 cms) long; 1 oz gross *Nicholas Brion (1652-1733) was a prolific instrument maker who wrote "Treatise sur les Instruments Mathematique", Paris 1709 which was translated into English in 1713

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