Royal Observatory Greenwich – postcard collection
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Estimated date
c.1994
Publisher
National Maritime Museum
Publisher's title
The prize-winning longitude watch H4, designed and completed in 1759 by John Harrison (1693–1776).
Nominal size
6.5 x 4.5 inches
Publisher/printer ref.
n/a
Website ref.
PC0525
Links
Other versions of the same image

© National Maritime Museum, London (negative No. D7064). Due to a production error, the wrong caption was printed on the back of the card.
 

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