PARTS LIST / TECHNICAL GUIDE
Double Retrograde Chronograph Cal.
7T85
[SPECIFICATIONS]
/7
Movement
Item
Cal. No.
7T85A
0 jewel
Stepping motor, 4 pieces
• Battery life indicator (The small second hand moves at two-sec-
ond intervals.)
• Date correction function
• Second hand stop function
• Electronic circuit reset function
Monthly rate: Less than 5 seconds (worn on the wrist at
temperature range between 5 ºC and 35 ºC)
Use 0-second gate.
SEIKO SR927SW
Nil
.55 V
Approx. 3 years
• STOPWATCH functions
00-minute stopwatch in /5-second increments, consecutively
measurable up to 300 minutes (5 hours)
Accumulated Elapsed Time Measurement
Split Time Measurement
STOPWATCH hand position adjustment
second
4002700, 2 pieces: 2.0 – 2.70 K
Ω
. Coil block for hour, minute, and small second
2. Coil block for stopwatch second
40027, 2 pieces: .80 – 2.40 K
Ω
. Coil block for stopwatch minute
2. Coil block for stopwatch 0 minute
Circuit block:
Less than 0.30 μA
Movement:
Less than .0 μA
Date setting (clockwise)
Time setting, hand position adjustment / resetting the circuit
Free
55
50
45
40
35
Outside: Ø 27.6 mm
Casing:Ø 27.0 mm
• Diameter
• Height:
3.3 mm
• 3 hands (hour, minute,
and small second hands)
• Calendar (date: date dial)
7T85
A
Battery No.
Driving system
Additional function
Crown operation
Loss/Gain
Regulation system
Gate time for rate measurement
Current consumption
Power supply
Battery life
Number of jewels
Interval of hands movements
Normal position
st click position
2nd click position
Coil resistance
Battery voltage
