A portrait of Mr Harrison and his timekeepers - Science Museum Blog
Reconstruction Of The John Harrison H4, The World's First Precision Marine Chronometer, By Derek Pratt And Roger Stevenson/Frodsham - Quill & Pad
Derek Pratt's Reconstruction Of John Harrison's H4, The World's First Precision Marine Chronometer (Part 1 of 3) - Quill & Pad
Rare pocketwatch linked to record-breaking episode of Only Fools and Horses found - Mirror Online
Bonhams : John Harrison, Liverpool. An 18ct gold key wind full hunter pocket watch Movement No.9215, Chester Hallmark for 1837
John Harrison - Wikipedia
Longitude found - the story of Harrison's Clocks | Royal Museums Greenwich
The Harrison Timekeepers H1, H2, H3 and H4 – Redfern Animation
Attractive 19th century 18ct engine turned pocket watch, Chester 1833, the fusee detached lever movement signed 'By John Harrison, Liverpool' with engraved balance cock, diamond endstone, regulator and gilt three arm balance,
In-Depth: The Microscopic Magic of H4, Harrison's First Sea Watch | SJX Watches
Marine Timekeeper known as 'H5' by John Harrison and Son 1770 | Science Museum Group Collection
Lot - A John Harrison open-face pocket watch
Harrison H4 Charles Frodsham and Co Ltd.
John Harrison's Marine Chronometers – London, England - Atlas Obscura
TIL in 1714 the British government offered £20K (~£2m today) to solve the longitude problem - which had cost thousands of lives due to a lack of ship positioning. John Harrison, a
John Harrison Liverpool - Wrist and Pocket Watches 2018/11/30 - Realized price: EUR 1,875 - Dorotheum
Mid-19th century silver fusee lever pocket watch, London 1846, the movement signed John Harrison, Liverpool, no. 31321, with Massey type III escapement, engraved balance cock, diamond endstone, steel three arm balance' Bosley
Lot - A John Harrison open-face pocket watch
John Harrison Liverpool - Wrist and Pocket Watches 2018/11/30 - Realized price: EUR 1,875 - Dorotheum
JOHN HARRISON LEPINE POCKET WATCH. WINDING - KEY. 18 KT … | Drouot.com
Lot 67 - Three silver pocket watches, signed John
Royal Observatory Greenwich John Harrison's H4-Inspired Gold Pocket Wa – Smartify
