Because it incorporates the earliest known example of the lever escapement this unique watch has been described as ‘perhaps the most historically important watch in the world’. With the exception of the balance spring, this was the greatest single improvement that has ever been applied to watches. As such, this watch is the forerunner of almost all modern wrist and pocket watches. In addition this was the first pocket watch to have an automatic device for compensating changes in temperature.
Explore more objects from the Royal Collection on line at royalcollection.org.uk/collection/search