A ships chronometer by Thomas Mercer, St Albans, 20th century, a two tier two day chronometer with a silvered signed dial, fusee movement with helical hairspring and hairspring escapement, retailed by Joseph Sewill, Liverpool, numbered 23001, in a single tiered box, the diameter of the bezel 110 mm, the box 21 cm high, 27 cm wide, 24 cm deep