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PARTS CATALOGUE
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TECHNICAL GUIDE
Cal. 5Y85A/5Y89A
[SPECIFICATIONS]
Cal. No.
Item
5Y85A
5Y89A
Movement
(x 1.0)
The illustrations refer to Cal. 5Y89A.
Movement
size
ø 24.0 mm
21.5 mm between 3 o’clock and 9 o’clock sides
21.5 mm between 6 o’clock and 12 o’clock sides
ø 23.3 mm
21.3 mm between 3 o’clock and 9 o’clock sides
21.5 mm between 6 o’clock and 12 o’clock sides
Time indication
3 hands (hour, minute and second hands)
Outside diameter
Casing diameter
Height
3.05 mm (Including battery portion)
Driving system
Additional mechanism
Loss/gain Monthly rate within normal temperature range: less than 20 seconds
Regulation system
Nil
Measuring gate by quartz tester
Use 10-second gate
SEIKO SR916SW
Battery
Battery No.
Voltage
1.55 V
Battery life
Approximately 3 years
Jewels
1 jewel
Step motor (Load compensated driving pulse type)
• Day calendar
• Instant setting divice for day calendar
• Date calendar
• Electronic circuit reset switch
• Train wheel setting device
• 24 hour dial disk
