SEIKO (SII) NH05/NH06 Setting Lever

Product Description

The SEIKO (SII) NH05/NH06 Setting Lever is a genuine Japanese-made component for these compact automatic movements. As a critical part of the keyless works mechanism, the setting lever controls the sliding pinion, enabling smooth and reliable switching between winding, date-setting, and time-setting positions when the crown is operated. This brand new original part is essential for watchmakers restoring proper crown function when the original setting lever becomes worn or damaged.

Features & Function

• Genuine Seiko/SII part – authentic Japanese-made component for NH05 and NH06 movements

• Keyless works component – controls the sliding pinion for reliable mode switching

• NH0 family compatibility – designed for the compact 7¾”’ NH05 (date) and NH06 (day-date) calibers

• Direct replacement – drop-in replacement for worn or damaged setting levers

Specifications

• 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

• Hand Sizes: Hour: 0.65mm / Minute: 1.10mm / Seconds: 0.20mm 

• Crown Positions: Normal (manual winding), 1st click (date/day setting), 2nd click (time setting)

• Origin: Japan

Applications

• Service and overhaul – replacing worn or damaged setting levers in NH05/NH06 movements

• Keyless works repair – resolving issues with crown position switching or improper engagement

• Crown function restoration – ensuring smooth winding, date-setting, and time-setting operation

• 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 NH05 and NH06 are manufactured by Seiko Instruments Inc. (SII) and distributed by Time Module Inc. (TMI) .

2. Which movements is this setting lever compatible with?

This setting lever 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 keyless works architecture .

3. What are the signs that the setting lever needs replacement?

Common signs include difficulty switching crown positions, the stem feeling stuck or loose, failure to engage winding/setting functions properly, or visible wear/damage during inspection. A qualified watchmaker can diagnose these issues.

Why Choose SOFLY Watch Parts?

• Fast worldwide shipping within 3 business days.

• Competitive pricing on Seiko/Hattori calibers.

• 3,000+ watch movements and parts in stock.

• Trusted by watchmakers worldwide.

• Personalized sourcing support via [email protected] or WhatsApp +86 18620212114.