Jaeger-LeCoultre ' Automatic' wristwatch, c 1953.
© Science Museum / Science & Society Picture Library
Wristwatch with reserve power indicator made by Jaeger-LeCoultre. Founded in 1903, Jaeger-LeCoultre was a prolific manufacturer and produced some of the most technically advanced watches of the 20th century, including the mechanical alarm watch the 'Memovox' in 1956. This Automatic, with an indicator to show how many hours worth of winding remained in the spring, is typical of their 1950s output.