Picture No | 10190546 |
Date | 20th century |
Description | Clocks at Greenwich |
Details |
Left, Synchronome Free Pendulum at Greenwich Observatory, with right, the Slave Clock which performs its 'escapement' function, accurate to 1/100th second.
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Source | Cigarette card in Player's series 'Clocks old and new' issued 1928 20 of 20 |
Credit | Mary Evans Picture Library |
Restrictions |
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