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 Schaffer - Mechanical Marvels : Clockwork Dreams - A must see video from the BBC
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.