[SPECIFICATIONS]
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PARTS LIST/ TECHNICAL GUIDE
ANALOGUE QUARTZ Cal. 4T57A
Cal. No.
Item
Interval of hands movement
Driving system
Additional function
Loss/gain
Regulation system
Gate time for rate measurement
Power
supply
Battery No.
Battery voltage
Battery life
Number of jewels
C r o w n
operation
Normal position
1st click position
2nd click position
Current consumption
Coil resistance
4T57A
• Electronic circuit reset switch
• Train wheel setting device
• [Time]
Indicated by the Hour, Minute, Second and Calendar
• [Stopwatch]
Up to 1 minutes in 1/10 second (2 seconds per round)
Up to 60 minutes in 1 second split time
Two pole stepping motor, Step motor 3 pieces
•
3 Hands (Hour, Minute, Second)
•
Chronograph (Minute, Second, 1/10 second)
•
Calendar
Use 10-second gate
0 jewels
•
Diameter
Outside : Ø29.50 mm (12H - 6H) × 26.00 mm
Casing:
Ø28.80 mm (12H - 6H)
• Height: 4.57 mm
1 second
Free
Date setting(clockwise)
Time setting, hand position adjustment / resetting the circuit
Nil
Movement: Less than 2.20 μA
Circuit block: Less than 1.04 μA
Monthly rate: Less than 20 seconds (at normal temperature range)
4002004 (COIL BLOCK A)
1.0 - 1.2 K
Ω
4002923 (COIL BLOCK B)
1.28 - 1.48 K
Ω
SEIKO SR920SW(SEIZAIKEN) Silver oxide battery
1.55 V
Approx. 2 years
