A two-day marine chronometer, the matt-silvered dial signed and numbered W. Brocking, Hamburg 1315, Roman hour numerals, subsidiary seconds and up-and-down dial with blued steel hands, gold hour and minute hands. Earnshaw escapement, spring foot detent, cut bi-metallic Guillaume balance with four circular heat compensation weights, blued steel helical balance spring, brass bowl and gimbal, 2-tier mahogany glazed box, external brass drop handles