Seiko NH35 User Manual

20.11.2023
UPLANDS & CO.
Horse-themed watches since 2023
Watch Instructions: Seiko NH35 Automatic Watches
SETTING THE DATE
1. Pull out the crown to the 1st position.
2. Rotate the crown clockwise (upward) to set the date.
3. Push the crown back in to the normal crown position.
Important: Do not change the date between 9:00 PM (21:00) and 4:00 AM as this may damage the
functionality and operation of the calendar.
SETTING THE TIME
1. Pull out the crown to the 2nd position.
2. Rotate the crown to set the hour and minute hands.
3. Push the crown back in to the normal crown position.
HACKING THE SECOND HAND
The second hand can be stopped to synchronize the time to another watch.
1. To stop the second hand, pull out the crown to the 2nd position.
2. Push the crown back in to the normal crown position when ready to synchronize.
WINDING THE MAINSPRING BY SIMPLY WEARING THE WATCH
By simply wearing the watch on your wrist, the mainspring is wound automatically as a result of the natural
motion of your arm.
WINDING THE MAINSPRING MANUALLY
Rotate the crown counter clockwise (downward) 8 times in the normal crown position and shake the watch
slightly.
Minute hand
Hour hand
Date window
Second Hand
Crown
Normal
Crown
Posion
2
nd
Posion
1
st
Posion

Seiko NH35 Specifications

General

Caliber	NH35
Type	Automatic
Jewels	24
Power Reserve	Approximately 41 hours
Hacking	Yes
Manual Winding	Yes
Diameter	27.4 mm
Height	5.32 mm
Functions	Hours, minutes, seconds, date
Accuracy	-20 to +40 seconds per day
Rotor Direction	Bidirectional
Frequency	21, 600 vibrations per hour (3Hz)

Summary

Setting the Date

Date Setting Procedure

Pull out crown to 1st position, rotate clockwise to set date, push crown back.

Date Change Warning

Avoid changing date between 9:00 PM and 4:00 AM to prevent damage.

Setting the Time

Time Setting Procedure

Pull out crown to 2nd position, rotate to set hands, push crown back.

Hacking the Second Hand

Second Hand Synchronization

Pull crown to 2nd position to stop second hand for synchronization.

Winding the Mainspring

Automatic Winding

Mainspring winds automatically from natural arm motion.

Manual Winding

Rotate crown counter-clockwise 8 times in normal position and shake.

Winding the Mainspring Using a Winding Machine

Determining 12 AM Midnight

Midnight Synchronization

Pull crown to 2nd position, rotate to advance hands until date changes.