Dr Ian White's comprehensive research along with great illustrations.
Its available from the AHS for just £27 including postage.
Full page colour illustrations of a very good selection of the clocks and watches in the Imperial collection in the Forbidden City Beijing.
Chinese and English text.
Professor Simon Schaffers brilliant Clockwork Dreams documentary.
The remarkable swan automaton by John Joseph Merlin at the Bowes museum -Constructed with clockworks
CheJaquet-Droz 240 year old writing boy - Is this the very first computer?
The Forbidden City documentary showing clock restoration in the workshop. At 5 and 23 then finally 32 minutes in.