"Extraordinary Sextant For Geodesic And Maritime Use"
THIS VERY IMPORTANT INSTRUMENT IS MOUNTED ON A TRIPOD FOOT WITH CALANTES SCREWS. TWO COUNTERWEIGHTS ALLOW PERFECT STABILITY. THE SEXTANT IS FIXED ON ITS SUPPORT BY A LARGE KNUTTED SCREW ALLOWING HORIZONTAL OBSERVATIONS. IT CAN BE DESOLIDARISABLE FOR A CLASSIC USE. THIS VERY ELABORATE AND HIGHLY PRECISION OPTICAL DEVICE WAS EMBARKED DURING OCEANOGRAPHIC MISSIONS SIGNED BY CARY IN LONDON IT CAN BE DATED FROM THE END OF THE 18TH CENTURY. WEIGHT 8.6 Kg !!! RADIUS 31 Cm. HEIGHT 44 Cm. 
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