This chronometer movement was made by John Roger Arnold about 1825.
This chronometer movement was made by Thomas Earnshaw, about 1798.
Box chronometer, after Thomas Mudge, No. 14 made by Howells, Barraud, and Jamison, 1802.
Malay Dagger and Sheath, Indonesia
Made by Jesse Ramsden in 1775, this machine permitted the automatic and highly accurate division of a circle into fractions of degrees of arc. The machine led to mass production of precision octants and sextants.