Another of his great strengths was his approach to the technical
limitations of the time. Watches back then were delicate. Dust, water,
changes in temperature – all of it could throw a movement off balance.
Wilsdorf did not ask why this was so, but what it would take to change
it.
The result was the Oyster in 1926, the first waterproof watch case. Not
the dramatic breakthrough it is sometimes portrayed as today, but the
outcome of methodical work: sealing, screw-down components, case
stability. That Mercedes Gleitze wore the watch while swimming the
English Channel was not heroic PR, but a pragmatic demonstration.
Wilsdorf wanted to show that his invention worked in everyday life – and
everyday life is rarely glamorous.
In 1931 came the automatic winding system, the Perpetual rotor.
Today, the idea seems obvious: a watch winds itself through the wearer’s movements. But behind it lay a very modern way of thinking. (…)