Portal:Anniversaries/May 7: Difference between revisions
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Latest revision as of 14:56, 23 July 2021
- 1965 — Armin Frei proposes using a quartz resonator for a wristwatch to CEH colleague, Rolf Lochinger. This would become Beta 1, the first quartz wristwatch.
- 2009 — A. Lange & Söhne launches the revolutionary Zeitwerk at an event in Berlin.