an ebony framed octant
By Fisher Farmouth
Signed and the bone-ivory scale signed S.B.R., brass mounted with pin-hole eye-piece, three shades, mirrors, the index arm with bone-ivory vernier scale, with tangent-screw fine adjustment and clamp
30.5cm. radius overall
an ebony framed octant
By Fisher Farmouth
Signed and the bone-ivory scale signed S.B.R., brass mounted with pin-hole eye-piece, three shades, mirrors, the index arm with bone-ivory vernier scale, with tangent-screw fine adjustment and clamp
30.5cm. radius overall
