For their 175th Anniversary, Patek Philippe released a plethora of novelties to commemorate the occasion. One such watch was the present reference 5975, a brand new interpretation of the chronograph wristwatch segment. Instead of the usual twin sub-dial configuration, for this limited edition Patek Philippe opted to only retain the chronograph seconds, with added scales on the dial which emulate snail-dial chronographs of the WW2 era.