Hi-Beat 36000 80 Hours

Caliber 9SA5

After the wide acclaim given over many years to the Caliber 9S series of mechanical movements, it had long been Grand Seiko’s goal to push the boundaries back further and create a new mechanical movement with enhanced performance, just as the first 9S movement had done two decades before. The decision was taken to aim for a new 10-beat movement that would offer a greatly increased power reserve. This is how Caliber 9SA5 was born.


Winding mechanism Automatic with manual winding
Mean daily rate*1 +5 to -3 seconds per day
Normal usage accuracy +8 to -1 seconds per day
Power reserve Approximately 80 hours
Vibrations 36,000 vibrations per hour (10 beats per second)
Number of jewels 47 jewels
Features -Dual Impulse Escapement
-Twin barrels
-Instant date change mechanism
  1. Mean daily rate is a mean value of daily rates in a condition where the movement before assembly in a case is measured in six positions in a fixed manner under artificially controlled environment for 12 days.