An important second quarter of the 19th century marine chronometer used on the second voyage of HMS Beagle and subsequently for the North American Boundary Expedition
W.E. Frodsham, London, number 2, dated 1825
The Case: The three part mahogany case of characteristic form, with brass carrying handles, escutcheon and release button for the upper cover with an inset brass 'x' Admiralty deaccession mark, the second cover cut for a larger plaque (now missing, probably removed when deaccessioned), the front of the box inset with an ivory plaque inscribed 'TWO DAYS'.
The Dial: The 3 inch silvered Roman dial signed 'Wllm. Edwd. Frodsham éleve of Parkinson and Frodsham, Change Alley, London, Two Days' the subsidiary seconds dial above VI, numbered '2', the reverse of the dial shows evidence of the removal of a broad arrow when deaccessioned.
The Movement: The signed and dated chain fusee movement with maintaining power, cut and compensated bi-metallic balance with cylindrical weights, helical spring and diamond endstone set in a double screwed chaton, the backplate inscribed 'Willm Edwd Frodsham AD 1825, London', the plate to the left of the balance drilled with a small shallow circular recess where the Ordnance arrow was removed when deaccessioned, set within a sprung inner cover, brass bowl and gimbals with a sprung lock. 16cm (6.25in)