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1944: Patek Philippe Ref. 1591
1944: Patek Philippe Ref. 1591, first Water Resistant Perpetual Calendar Wristwatch

It’s a leap year, and in the run-up to that special day Feb 29, Revolution takes a look at some of the Perpetual Calendars that mattered. Here, we turn the spotlight on the Patek Philippe ref. 1591, a sporty perpetual calendar in waterproof stainless steel case and lumed hands:
In 1944, Patek Philippe created what is my single favorite perpetual calendar watch ever made. The reference 1591 was a highly audacious timepiece in that it combined the elegant functionality and technical innovation related to the perpetual calendar with a waterproof case, luminous hands and dial.
https://www.revolution.watch/1944-patek ... ess-steel/

It’s a leap year, and in the run-up to that special day Feb 29, Revolution takes a look at some of the Perpetual Calendars that mattered. Here, we turn the spotlight on the Patek Philippe ref. 1591, a sporty perpetual calendar in waterproof stainless steel case and lumed hands:
In 1944, Patek Philippe created what is my single favorite perpetual calendar watch ever made. The reference 1591 was a highly audacious timepiece in that it combined the elegant functionality and technical innovation related to the perpetual calendar with a waterproof case, luminous hands and dial.
https://www.revolution.watch/1944-patek ... ess-steel/

1946-2006
“Your heart was warm and happy
With the lilt of Irish laughter
Every day and in every way
Now forever and ever after."