SEIKO (SII) NH38/NH39 Setting Lever #0383186

Quantity	Discount (%)	Price
1 - 2	—	$1.00
3 - 4	5 %	$0.95
5 - 9	7 %	$0.93
10 - 14	10 %	$0.90
15+	15 %	$0.85

Quantity

Discount (%)

Price

1 - 2

—

$1.00

3 - 4

5 %

$0.95

5 - 9

7 %

$0.93

10 - 14

10 %

$0.90

15+

15 %

$0.85

Quantity	Discount (%)	Price
1 - 2	—	$1.00
3 - 4	5 %	$0.95
5 - 9	7 %	$0.93
10 - 14	10 %	$0.90
15+	15 %	$0.85

Product Description

The SEIKO (SII) NH38/NH39 Setting Lever (#0383186) is a genuine Japanese-made component for the NH38 and NH39 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 and time-setting modes 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 the NH38 and NH39 movements

Keyless works component – controls the sliding pinion for mode switching

Smooth crown operation – enables reliable transition between winding and time-setting positions

NH38/NH39 specific – designed for open-heart movements with hacking seconds and hand-winding capability

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

Specifications

Part Number: 0383186

Compatible Movements: Seiko NH38, NH39 (also known as 4R38/4R39)

Movement Family: NH Series (based on NH35 architecture)

Movement Frequency: 21,600 vph (3 Hz)

Jewels: 24

Power Reserve: ~41 hours

Features: Hacking (seconds stop), hand-winding, open-heart balance display (NH38/NH39)

Origin: Japan

Applications

Service and overhaul – replacing worn or damaged setting levers in NH38/NH39 movements

Keyless works repair – resolving issues with crown position switching or winding/setting engagement

Crown function restoration – ensuring smooth winding 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 NH38 and NH39 are manufactured by Seiko Instruments Inc. (SII) and distributed by Time Module Inc. (TMI) . Using genuine parts ensures proper fit, long-term durability, and maintains the movement’s factory specifications .

2. Which movements is this setting lever compatible with?

This setting lever is specifically designed for the Seiko NH38 and NH39 movements. The NH38 is an open-heart movement with no date or day function, while the NH39 adds a 24-hour subdial at approximately 10:30 position . The keyless works mechanism operates identically on both calibers .

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

Common signs include difficulty switching crown positions, loose or stiff crown operation, or failure to engage winding/setting functions properly. The NH38/NH39 has two crown positions: position 0 for hand-winding and position 1 (fully pulled) for time-setting with hacking . If switching between these positions becomes irregular, the setting lever may need replacement.