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Omega Electroquartz
The Omega Electroquartz was introduced in 1969 as the first production Swiss quartz watch. It was the collaboration of 20 Swiss watch companies and the movement was utilised by Rolex, Patek Phillipe and Omega SA amongst others. The Beta 21 movement used in the Electroquartz was accurate to 5 seconds per month, far better than any automatic or manual wind movement of the day.
==Introduction==
The Omega Electroquartz was the first Swiss quartz watch produced as part of a range called beta 21 watches, the beta 21 was developed at CEH research laboratory by twenty Swiss watch manufacturers. The first production watches were introduced to the market in 1970 very shortly after the first quartz watch, the Seiko 35 SQ Astron in December 1969. The beta 21 is noteworthy and significantly important to the history of watch making as it marked the first quartz watch produced on an industrial level and began what has now come to be known in the watchmaking world as the quartz crisis
Numerous Swiss manufacturers released beta 21 watches, the first Rolex Oysterquartz model used the beta 21 movement, Patek Philippe also produce a range of beta 21 models as did the International Watch Company including it in their first Davinci watch.〔Lucien F. Trueb, Günther Ramm & Peter Wenzig (2013) Electrifying the Wristwatch P.100 - P.105 ISBN ISBN 9780764343049〕
By far the largest supplier of beta 21 and subsequent beta 22 watches was Omega SA, who produced circa 10,000 Electroquartz watches between 1970 and 1977
抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』
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