A World War II era two-day mahogany marine chronometer with Ordnance arrowThomas Mercer, Eywood Rd, St. Albans, Eng. No. 15921The three part case with blank brass cartouche inlaid on the top lid, the centre section with 12 point brass star button above a removed plaque, the lower section with inlaid 12 point brass escutcheon and internal raised dust lip. The 4 inch signed silvered Roman dial with power reserve indicator from 0-56 hours below XII and observatory style seconds at VI, numbered 15921 and an arrowhead in the centre, signed Thomas Mercer Eywood Rd. St. Albans, Eng. below the blued steel spade hands. The spotted full plate movement with four pillars and maintaining power to the chain fusee, free sprung helical balance spring with diamond endstone and Earnshaw type escapement, cut and compensated bimetallic balance with circular timing weights and cork buffered winding arbor, sitting in a weighted, punch numbered gimballed bowl marked to the underside H.S.^1. Ticking with a Tipsy key, hand setting key and a case key.Tipsy Key 21cms (8ins) wide. Footnotes:Purchased May 2007 from Jeffery Formby.