It wouldn't be right to do a feature about London timepieces without mentioning Greenwich. The most unusual feature of the Shepherd Gate Clock is that it has a 24 hour dial. Mounted on the wall outside the Royal Observatory, it is thought to have been the first clock to display Greenwich Mean Time to the public (although to this day, it doesn't display daylight saving time). It was originally controlled by electric pulses from a master clock inside the building, but the master clock is no longer in use and this one is controlled by a quartz mechanism. Shepherd refers to Charles Shepherd Junior, who made and installed the clock in 1852.
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