Expert installation is recommended!

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Specifications:

• Caliber number: Seiko NH34A (aka NH34 or 4R34)
• Up to 41+ hours of power reserve
• Movement type: automatic
• Frequency/Vibrations per hour: 21600 bph
• Accuracy: -20~+40 sec per day
• Hack-second or stop-second feature allows you to set the time precisely
• 24 Jewels
• Function: 4 Hands including a 2nd hour hand for GMT function, automatic and manual winding, date function
• Winding Direction: Clockwise
• Diameter: 27.40 mm
• Hand bore sizes: hour 1.50, minute .90mm, seconds' .21mm, GMT 2.2mm