An 18th Century mahogany and brass octant signed on the maker's bone plaque Joseph Clark '79 , with double 'pin-hole' sight and slide, back sight, two shades, mirrors, the index arm with framed vernier scale and clamp, the arc with bone scale divided 0°-90°, with three brass pad feet in shaped case - 18¾in.(47.5cm)wide
An 18th Century mahogany and brass octant signed on the maker's bone plaque Joseph Clark '79 , with double 'pin-hole' sight and slide, back sight, two shades, mirrors, the index arm with framed vernier scale and clamp, the arc with bone scale divided 0°-90°, with three brass pad feet in shaped case - 18¾in.(47.5cm)wide
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Suchauftrag anlegen.jpg "Quelle: Christie's")
.jpg "Quelle: Christie's")
.jpg "Quelle: Christie's")
.jpg "Quelle: Christie's")
