John Harrison (1693-1776), the english clockmaker, portrait by Thomas King, c.1766. Harrison is most famous for his marine chronometers.

- Image ID: M577T9
John Harrison (1693-1776), the english clockmaker, portrait by Thomas King, c.1766. Harrison is most famous for his marine chronometers.
IanDagnall Computing / Alamy Stock Photo
Image ID: M577T9