A matt black enamelled brass sextant, signed on the arc C. Plath, Hamburg, with silvered scale, telescope mounting socket, seven shades, mirrors, the index arm with vernier and magnifier tangent screw adjustment and clamp, the shaped frame with ebonised oak handle -- 7 1/8in (18.1 cm) radius, with accessories in mahogany case -- 11½in (29.2 cm) wide