ARNOLD & DENT No. 975: A small two-day marine chronometer, the silvered dial signed Arnold & Dent, 84 Strand, London No975, Roman hour chapters, subsidiary seconds and up-and-down dials, blued steel hands, Earnshaw escapement, later restored spring foot detent and J.R. Arnold's 'U + I' balance with non-ferrous cross-arm, oversprung blued steel helical balance spring, standard 14400 train, brass bowl and gimbal, three-tier plain mahogany box, circular ivory disc to front of centre section inscribed 975, external brass drop handles Dial diameter: 87mm.