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A late 20th century John Harrison replica brass grasshopper escapement 'sea clock' timepiece the clock 37cm high, 45cm high overall including case - Bonhams
A late 20th century John Harrison replica brass grasshopper escapement 'sea clock' timepiece the clock 37cm high, 45cm high overall including case - Bonhams

H4 | Royal Museums Greenwich
H4 | Royal Museums Greenwich

JOHN HARRISON - 1693-1776 - ENGLAND
JOHN HARRISON - 1693-1776 - ENGLAND

John Harrison - Wikipedia
John Harrison - Wikipedia

John Harrison - Wikipedia
John Harrison - Wikipedia

John Harrisons Last Marine Timepiece Canvas Print / Canvas Art by Science Source - Pixels Canvas Prints
John Harrisons Last Marine Timepiece Canvas Print / Canvas Art by Science Source - Pixels Canvas Prints

H4 | Royal Museums Greenwich
H4 | Royal Museums Greenwich

John Harrison and the Longitude Problem | Naval History Magazine - October 2019 Volume 33, Number 5
John Harrison and the Longitude Problem | Naval History Magazine - October 2019 Volume 33, Number 5

Internal clockwork of John Harrison's H4 watch, the world's first accurate timepiece, completed in 1759 [1281x1280] : r/ArtefactPorn
Internal clockwork of John Harrison's H4 watch, the world's first accurate timepiece, completed in 1759 [1281x1280] : r/ArtefactPorn

Harrison's Marine Chronometer - World History Encyclopedia
Harrison's Marine Chronometer - World History Encyclopedia

John Harrison H4 - World's Most Important Clock Can Be Seen In Greenwich, London | Guide London
John Harrison H4 - World's Most Important Clock Can Be Seen In Greenwich, London | Guide London

John Harrison's Marine Chronometers – London, England - Atlas Obscura
John Harrison's Marine Chronometers – London, England - Atlas Obscura

A GRASSHOPPER ESCAPEMENT TIMEPIECE JOHN HARRISON REPLICA, 8 day fusee brass movement with dumbell we
A GRASSHOPPER ESCAPEMENT TIMEPIECE JOHN HARRISON REPLICA, 8 day fusee brass movement with dumbell we

In-Depth: The Microscopic Magic of H4, Harrison's First Sea Watch | SJX Watches
In-Depth: The Microscopic Magic of H4, Harrison's First Sea Watch | SJX Watches

Meeting Recap - John Harrison: Longitude, the Precision Watch and Pendulum Clock — Horological Society of New York
Meeting Recap - John Harrison: Longitude, the Precision Watch and Pendulum Clock — Horological Society of New York

The First Global Positioning System Was This Marine Chronometer Watch | Gear Patrol
The First Global Positioning System Was This Marine Chronometer Watch | Gear Patrol

John Harrison's H1 timepiece | The Planetary Society
John Harrison's H1 timepiece | The Planetary Society

The Harrison Timekeepers H1, H2, H3 and H4 – Redfern Animation
The Harrison Timekeepers H1, H2, H3 and H4 – Redfern Animation

Marine Timekeeper known as 'H5' by John Harrison and Son 1770 | Science Museum Group Collection
Marine Timekeeper known as 'H5' by John Harrison and Son 1770 | Science Museum Group Collection

Object of the week- The Harrison clock
Object of the week- The Harrison clock

John harrison chronometer hi-res stock photography and images - Alamy
John harrison chronometer hi-res stock photography and images - Alamy

Harrison H3 Charles Frodsham and Co Ltd.
Harrison H3 Charles Frodsham and Co Ltd.

The Harrison Timekeepers H1, H2, H3 and H4 – Redfern Animation
The Harrison Timekeepers H1, H2, H3 and H4 – Redfern Animation

John Harrison's Marine Chronometer
John Harrison's Marine Chronometer

H5", marine chronometer. This timepiece was completed in 1770 by John Harrison (1693-1776), British instrument maker. In 1713, the British Governmen Stock Photo - Alamy
H5", marine chronometer. This timepiece was completed in 1770 by John Harrison (1693-1776), British instrument maker. In 1713, the British Governmen Stock Photo - Alamy