 Its striking mechanism could be used as an alarm for waking up, appointments, timetables, etc.The first models were hand wound and equipped with the Jaeger-LeCoultre Calibre 489.In 1956, a Memovox featuring the Jaeger-LeCoultre Calibre 815 became the first self-winding alarm watch in history, while shortly thereafter the company marked its 125th anniversary by releasing the Memovox Wordtime.