細節
A VICTORIAN SMALL MAHOGANY TWO-DAY MARINE CHRONOMETER
By Parkinson & Frodsham No. 2805, Mid-19th century
The silvered dial signed and numbered Parkison & Frodsham, Change Alley, London 2805, Roman hour numerals, five minute intermarkers with Arabic numerals 60-5-10 et seque. Subsidiary seconds and up-and-down dials, blued steel hands, small size movement, (58 mm diam.) the top-plate inscribed Parkinson & Frodsham, Change Alley, London, Earnshaw escapement, cut bimetallic balance with small cylindrical heat compensation weights, blued steel helical balance spring, brass bowl, convex glass, gimballed in plain three-tier mahogany box, the centre section with inset bone disc inscribed 2805, external brass drop handles
70 mm. dial diam; Box 140 mm. square