Details
A brass and steel micrometer caliper,
signed Troughton & Simms LONDON, with two verniers 'For Outsides' and 'For Insides', with tangent-screw fine adjustment and clamp -- 14¾in. (37.5cm.) long
signed Troughton & Simms LONDON, with two verniers 'For Outsides' and 'For Insides', with tangent-screw fine adjustment and clamp -- 14¾in. (37.5cm.) long