1889: Perpetual calendar mechanism (1018)

A perpetual calendar mechanism designed for pocket watches.This mechanism’s advantage lies in its ability to produce both instantaneously and simultaneously the jump in days, dates, months and lunar phases.Able to perform in all dimensions, the mechanism is characterised by its combination of its wheel, which carries a bevelled pin, its heart-piece and its levers that simultaneously cause its star-wheels to come into action.

1845: The Keyless Watch (1317)

Mechanism for setting and winding watches by the pendant, applicable to all types of watches.Until the middle of the last century, pocket watches had to be wound and set with a separate key that fit into holes in the case. The holes let in dirt, the keys were lost. No watchmaker, for 250 years, had found a practical solution.Adrien Philippe's invention of the modern winding and setting stem and crown (pull out to set, push in to wind) was more than a clever mechanism. It changed the nature of watches. The self-contained, keyless watch that could be sealed, evolved into today's waterproof wristwatch.Adrien Philippe specified his invention would be "applicable to all types of watches" - a feature seen to this day in timepieces that he could never have imagined - self-winding and ultra-thin wristwatches, quartz watches, date watches and diving watches. Nobody has yet thought up a more practical idea for the job.

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