A TWO-DAY MARINE CHRONOMETER, the silvered dial signed Brockbank & Atkins, London No 1267, Roman hour numerals, subsidiary up-and-down and seconds dials with blued steel hands, gold hour and minute hands small size movement (diameter 2½in 62mm) top-plate signed and numbered Brockbank Atkins London 1267, Earnshaw escapement, cut bi-metallic balance,circular heat compensation weights, blued steel helical balance spring, spring foot detent, contained in brass bowl, gimballed in brass-bound 3-tier mahogany box with external drop handles -- 6½in (163cm) square