Assertion: clock's dial | /r/HasAspect | hour hand
Facets:
value: usually
type: TEMPORAL
Source sentences:
text: The time-telling dials of these clocks usually had an hour hand only (minute hands did not generally appear until the 1650s) and were exposed to the air; there was normally no form of cover such as a glass until the 17th century, though the mechanism was enclosed, and the cases were made of brass.