Seiko Calibre 7T86A Quartz Chronograph Movement with Alarm and Perpetual Calendar

Restore a compatible watch with the Seiko Calibre 7T86A analogue quartz chronograph movement, featuring standard timekeeping, a stopwatch, single-time alarm, and perpetual-calendar functions.

The chronograph measures elapsed time in 1/5-second increments and provides a 100-minute display while supporting continuous measurement for up to 24 hours. Split-time measurement is also available.

Its perpetual calendar automatically accounts for different month lengths and leap years, requiring no calendar correction through February 28, 2100 when configured correctly. A battery-life indicator moves the small seconds hand at two-second intervals when battery power is running low.

Product Specifications

Product Type: Analogue Quartz Alarm Chronograph Movement
Manufacturer: Seiko
Calibre: 7T86A
Main Display: Hour, Minute and Small Seconds
Chronograph: 1/5-Second Measurement
Chronograph Display: Up to 100 Minutes
Maximum Chronograph Measurement: Up to 24 Hours
Split-Time Measurement: Yes
Alarm: Single-Time Alarm
Alarm Sound Demonstration: Yes
Calendar: Perpetual Calendar
Calendar Programming: Through February 28, 2100
Outside Diameter: 27.60 mm
Casing Diameter: 27.00 mm
Movement Height: 3.30 mm
Hand Movement: One-Second Intervals
Driving System: Four Step Motors
Required Battery: SR927SW
Battery Voltage: 1.55 V
Estimated Battery Life: Approximately 5 Years
Accuracy: Within ±15 Seconds per Month
Battery-Life Indicator: Yes
Seconds-Hand Stop Function: Yes
Electronic Circuit Reset: Yes
Jewels: 0

Please compare the complete calibre marking, movement dimensions, hand-height version, dial and subdial arrangement, calendar configuration, hand fittings, stem position, pusher locations, alarm components, and movement holder with your existing movement before ordering.

Professional installation is strongly recommended. The calendar, alarm, and chronograph hands must be correctly aligned and calibrated after installation.

Package Contents

1 × Seiko Calibre 7T86A Quartz Chronograph Movement Only

Important: The battery, winding stem, hands, dial, movement holder, and all other accessories are not included.

Seiko and its associated marks are trademarks of their respective owner. The name and calibre reference are used solely for accurate product identification.