GRAND SEIKO SBGM021

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Specifications

REF. SBGM021
Driving system Mechanical Automatic (Hand winding capability)
Caliber No. 9S66
Case Stainless steel Case back: Stainless steel and sapphire crystal
Glass Box-shaped sapphire crystal
Coating Anti-reflection coating on inner surface
Lumibright -
Accuracy +5 to -3 secnds per day (when static); This accuracy is the result of measuring the loss/gain of the time for seventeen days before the inside movements of the watch are put in the case. The measurement has been done in the factory where temperatures or position of the movements are controlled. When the watch is actually worn, the accuracy should be from -1 second/day to +10 seconds/day (-1 second/day to +8 seconds/day for Cal.9S85, 9S86).
Water resistance 3 bar
Magnetic resistance 4800 A/m (60 gauss)
Weight 88.0 g
Case size Diameter 39.5mm  Thickness 13.7mm
Remarks ?See-through back
?Jewels: 35
?Dual time function with 24-hour display
?Quick correction function of time difference adjusting to a calender
?Power reserve: Over 72 hours

 

 

Specifications

REF. SBGM021
Driving system Mechanical Automatic (Hand winding capability)
Caliber No. 9S66
Case Stainless steel Case back: Stainless steel and sapphire crystal
Glass Box-shaped sapphire crystal
Coating Anti-reflection coating on inner surface
Lumibright -
Accuracy +5 to -3 secnds per day (when static); This accuracy is the result of measuring the loss/gain of the time for seventeen days before the inside movements of the watch are put in the case. The measurement has been done in the factory where temperatures or position of the movements are controlled. When the watch is actually worn, the accuracy should be from -1 second/day to +10 seconds/day (-1 second/day to +8 seconds/day for Cal.9S85, 9S86).
Water resistance 3 bar
Magnetic resistance 4800 A/m (60 gauss)
Weight 88.0 g
Case size Diameter 39.5mm  Thickness 13.7mm
Remarks ?See-through back
?Jewels: 35
?Dual time function with 24-hour display
?Quick correction function of time difference adjusting to a calender
?Power reserve: Over 72 hours