John Harrison's design for the 'lesser watch' mentioned by him to the Board of Longitude on 19th June 1755, from a set of mechanical notes and drawings compiled by John Harrison and his son William(John Harrison's design for the 'lesser watch' mentioned by him to the Board of Longitude on 19th June 1755, from a set of mechanical notes and drawings compiled by John Harrison (1693-1776) and his son William (c.1726-72) (pen & ink on paper))Unbekannt |
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Undated · pen and ink on paper
· Picture ID: 978350
The Worshipful Company of Clockmakers' Collection, UK / Bridgeman Images |
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