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Grand Seiko

Grand Seiko Heritage Automatic Spring Drive 41mm sbga201

Grand Seiko Heritage Automatic Spring Drive 41mm sbga201

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Condition New/Unworn
Case Shape Round
Case Dimensions 41mm
Case Thickness 12.5mm
Case Material Stainless Steel
Dial Color Silver
Crystal Scratch Resistant Sapphire
Screw-in Crown No
Water Resistance
No rating Does not allow contact with water
30m/99ft - 50m/165ft Allows for contact with water such as washing hands and rain
50m/165ft - 100m/330ft Allows for light poolside swimming
100m/330ft - 200m/660ft Allows for swimming, snorkeling and showering (do not expose to hot water)
200m/660ft - 500m/1650ft Allows for impact water sports such as board diving and scuba diving
500m/1650ft + Appropriate for serious deep water diving.

Learn more about Water Resistance.

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100m/330ft
Case Back Transparent
Band Material Stainless Steel
Color/Finish Brushed
Clasp Push Button Deployant Buckle
Movement Automatic
Complications Power Reserve Indicator
  • Brushed & polished stainless steel case.
  • Silver dial with a very fine sun-ray finish.
  • Applied polished index hour markers.
  • Fine printed minute/seconds track.
  • Polished hands.
  • Date window displayed at 3 o'clock.
  • Power Reserve Indicator located between 7 & 8 o'clock.
  • Grand Seiko Spring Drive caliber 9r65: The Spring Drive movement is for the most part mechanical, but with a electrical powered regulating mechanism resulting in an extremely accurate timepiece.
    • No external source of power (such as a battery) is required. The unwinding force of the mechanically wound mainspring generates a slight electrical current.
    • The electrical power is then used to activate & power a quartz oscillator which vibrates at 32,786 Hz & transmits a precise reference signal to the Integrated Circuit.
    • The IC compares the speed from the oscillator to the speed of the glide wheel (which drives the gears) and applies a magnetic brake when it detects the glide-wheel turning too fast.
    • The seconds hand moves in a continuous smooth gliding motion.
    • Accurate up to +/- 1 second per day.
    • Contains 30 jewels & has an approximate power reserve of 72 hours or 3 days.

Alternate model # sbga201

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