SEIKO (SII) NH36 Day Corrector Wheel #0989070

Product Description

The SEIKO (SII) NH36 Day Corrector Wheel (#0989070) is a genuine Japanese-made component for the NH36 automatic movement . As part of the keyless works and calendar mechanism, this wheel is responsible for enabling the quick-set day adjustment when the crown is pulled to the first click position and turned . This brand new original part is essential for watchmakers restoring proper day function when the original corrector wheel becomes worn or damaged.

Features & Function

• Genuine Seiko/SII part – authentic Japanese-made component for the NH36 (4R36) movement 

• Calendar mechanism component – enables quick-set day adjustment via the crown 

• NH36 specific – designed for the day-date calendar module of the NH36 caliber 

• Direct replacement – drop-in replacement for worn or damaged day corrector wheels 

Specifications

• Part Number: 0989070 (also listed as 989070)

• Compatible Movement: Seiko NH36 (also known as 4R36)

• Movement Family: NH Series (based on NH35 architecture)

• Movement Frequency: 21,600 vph (3 Hz)

• Jewels: 24

• Power Reserve: >41 hours

• Calendar Function: Day + Date (both quick-set) 

• Origin: Japan

Applications

• Service and overhaul – replacing worn or damaged day corrector wheels in NH36 movements

• Calendar function restoration – resolving issues with day quick-set adjustment

• Movement upgrade – repairing the calendar module during 7S26-to-NH36 conversions

• Suitable for professional watchmakers and experienced repair technicians

FAQs

1. Is this a genuine Seiko/SII part?

Yes, this is a genuine Seiko (SII/TMI) factory part made in Japan. The NH36 (4R36) is manufactured by Seiko Instruments Inc. (SII) and distributed by Time Module Inc. (TMI) .

2. Which movements is this day corrector wheel compatible with?

This day corrector wheel is specifically designed for the Seiko NH36 movement (and its branded version, the 4R36) . It is not compatible with NH35 (date-only) or other NH series movements without day function.

3. What are the signs that the day corrector wheel needs replacement?

Common signs include the day not advancing when the crown is turned in the first position, irregular day changes, or visible wear/damage during movement inspection. The NH36 uses a two-position crown system: position 1 for day/date quick-set, and position 2 for time-setting with hacking .

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