Assertion: quartz watch | /r/HasProperty | the seiko 35 sq astron
Facets:
Source sentences:
text: The first quartz watch to enter production was the Seiko 35 SQ Astron, which hit the shelves on 25 December 1969, swiftly followed by the Swiss Beta 21, and then a year later the prototype of one of the world's most accurate wristwatches to date: the Omega Marine Chronometer.