A TWO-DAY MARINE CHRONOMETER signed Thomas Mencen, Eymoor Rd. St. Albans, no. 15629, the gilt movement with spring detent escapement, bi-metallic balance, free spring with helical hairspring, timing screws and weights, fusee and chain, signed silvered dial with Roman chapters, winding indicator, subsidiary seconds, blued steel hands, within a brass bowl, gimbal mounted in a glazed mahogany deck box