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The SEIKO (SII) NH05/NH06 Day-Date Corrector Finger is a genuine Japanese-made component for these compact automatic movements. As a key part of the calendar mechanism, the corrector finger engages with the date wheel to enable quick-set day and date correction when the crown is pulled to the first click position. When the original corrector finger becomes worn or damaged, the day or date may fail to advance correctly, making this brand new original part essential for watchmakers restoring proper calendar function.
Genuine Seiko/SII part – authentic Japanese-made component for NH05 and NH06 movements
Calendar mechanism component – enables quick-set day and date correction via the crown
NH0 family compatibility – designed for the compact 7¾”’ NH05 (date) and NH06 (day-date) calibers
Direct replacement – drop-in replacement for worn or damaged corrector fingers
Compatible Movements: Seiko NH05 (date), NH06 (day-date)
Movement Family: NH0 Series
Movement Size: 7¾”’ (approx. 17.5mm)
Movement Height: 5.92mm
Jewels: 21
Frequency: 21,600 vph (3 Hz)
Power Reserve: >40 hours
Crown Positions: Normal (manual winding), 1st click (date/day setting), 2nd click (time setting)
Origin: Japan
Service and overhaul – replacing worn or damaged day-date corrector fingers in NH05/NH06 movements
Calendar function restoration – resolving issues with day or date not advancing correctly
Suitable for professional watchmakers and experienced repair technicians
1. Is this a genuine Seiko/SII part?
Yes, this is a genuine Seiko (SII/TMI) factory part made in Japan. The NH05 and NH06 are manufactured by Seiko Instruments Inc. (SII) and distributed by Time Module Inc. (TMI).
2. Which movements is this corrector finger compatible with?
This corrector finger is designed for Seiko NH05 and NH06 movements. The NH05 features a date display, while the NH06 adds a day-date complication, but both share the same calendar mechanism architecture. The corrector finger is mounted under the date indicator maintaining plate.
3. What are the signs that the corrector finger needs replacement?
Common signs include the day or date not advancing when the crown is turned in the first position, irregular calendar changes, or visible wear/damage during movement inspection. As noted in watch repair forums, when the date does not jump correctly, the corrector finger may be failing to push the date wheel far enough for the date jumper to latch.
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