https://whowatchwear.com/christopher-ward-marks-15-years-of-jj01-with-the-c1-jump-hour-xv/
https://whowatchwear.com/christopher-ward-marks-15-years-of-jj01-with-the-c1-jump-hour-xv/
A mechanical jump hour: instead of conventional hands, the hour jumps instantly to the next number while rotating discs display the minutes and seconds.
HOGA patented its Directime system in the 1950s.
#HOGA #Directime #JumpHour #VintageWatch #Horology
A mechanical jump hour: instead of conventional hands, the hour jumps instantly to the next number while rotating discs display the minutes and seconds.
HOGA patented its Directime system in the 1950s.
#HOGA #Directime #JumpHour #VintageWatch #Horology
https://whowatchwear.com/niton-prima-brings-a-geneva-jump-hour-name-back-into-focus/
https://whowatchwear.com/niton-prima-brings-a-geneva-jump-hour-name-back-into-focus/