Mining Compass
William Charles Cox, circa 1830
signed to silvered dial W.C. Cox, Devonport, with eight-point compass rose degree scale 0-90-0-90-0 and further degree scale 0-360 with two detachable alidades, outer degree scale 0-360 with vernier, further attachable inclinometer engraved Diff. of Hypo. & Base, in original fitted oak case
12in. (30.5cm.) long
Mining Compass
William Charles Cox, circa 1830
signed to silvered dial W.C. Cox, Devonport, with eight-point compass rose degree scale 0-90-0-90-0 and further degree scale 0-360 with two detachable alidades, outer degree scale 0-360 with vernier, further attachable inclinometer engraved Diff. of Hypo. & Base, in original fitted oak case
12in. (30.5cm.) long
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