Tag Archives: h4

The National Maritime Museum: Royal Observatory Greenwich, London

This is undoubtedly ‘Mecca’ to any serious horologists: the Royal Observatory Greenwich.

Royal Observatory Greenwich

It is the home of John Harrison’s marine clocks, generally regarded as the most important time pieces ever made! Four of his masterpieces are on display here: H1, H2, H3, and H4. (H5 is at the Worshipful Company of Clockmakers at Guild Hall.) The museum does not allow photography so I have included publicity photos of each timepiece.

Harrison Chronometers Royal Observatory Greenwich

Harrison Chronometers Royal Observatory Greenwich

Greenwich Mean Time

Greenwich is the location of the Prime Meridian. The Prime Meridian is the meridian (line of longitude) at which longitude is defined to be 0°.

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