Assertion: pocket watch's movement | /r/HasProperty | based on the verge escapement
Facets:
value: until the early 1700s
type: TEMPORAL
value: up to the 1720s
type: TEMPORAL
Source sentences:
text: Up to the 1720s, almost all watch movements were based on the verge escapement, which had been developed for large public clocks in the 14th century.
text: Until the early 1700s, all the movements were based around the verge escapement which had been used in large clocks back in the 14th and 15th century.