Harrison's 4th Marine Timekeeper Drawing

© National Maritime Museum, Greenwich, London

Harrison's 4th Marine Timekeeper Drawing

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Product details

Overall size of this product is 40 × 30 cm.
The image area of the print measures 30 × 22 cm.

Plate X, figures 14 & 15 relating to Harrison's 4th marine timekeeper taken from 'The Principles of Mr Harrison's Timekeeper' (1767). Print reads: 'Let the diameter of the upper plate be 1/16 Inch more'. John Harrison's H4 is the most important timekeeper ever made. It also helped solve the Longitude puzzle which helped save countless lives at sea.

Artist: Unknown

Date: 1767


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