SEIKO (SII) NH35/NH36/NH37/NH38/NH39 Pawl Lever #0831183

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) NH35/NH36/NH37/NH38/NH39 Pawl Lever (#0831183) is a genuine Japanese-made component for the popular NH series automatic movements. Also known as the “Magic Lever,” this is the core component of Seiko’s proprietary bidirectional automatic winding system—a simple yet highly efficient mechanism that converts rotor movement in both directions into energy to wind the mainspring . This brand new original part is essential for watchmakers restoring proper automatic winding function when the original pawl lever becomes worn or damaged .

Features & Function

Genuine Seiko/SII part – authentic Japanese-made component for NH35, NH36, NH37, NH38, and NH39 movements

“Magic Lever” winding system – the core component of Seiko’s proprietary bidirectional automatic winding mechanism

Bidirectional winding – converts rotor movement in both clockwise and counterclockwise directions into mainspring energy

Simple & robust design – fewer parts than conventional reverser-gear systems, highly reliable and durable

NH family compatibility – compatible across the most popular NH series calibers

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

Specifications

Part Number: 0831183 (also listed as 0831-183 in some parts documentation)

Compatible Movements: Seiko NH35, NH36, NH37, NH38, NH39 (also known as 4R35/36/37/38/39)

Movement Family: NH Series (Basic Mechanical Series)

Winding System Type: Seiko Magic Lever (pawl-based bidirectional winding)

Movement Frequency: 21,600 vph (3 Hz)

Jewels: 24

Power Reserve: >41 hours

Hacking: Yes

Hand-Windable: Yes

Origin: Japan

Applications

Service and overhaul – replacing worn or damaged pawl levers in NH series movements

Automatic winding repair – restoring efficient bidirectional winding of the mainspring

Magic Lever system restoration – ensuring proper engagement of the lever mechanism for consistent power delivery

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 NH series is manufactured by Seiko Instruments Inc. (SII) and distributed by Time Module Inc. (TMI). The part number 0831183 is the official Seiko designation for the Pawl Lever in the NH3 series technical documentation .

2. What is the “Magic Lever” and how does it work?

The Magic Lever (pawl lever) is Seiko’s proprietary bidirectional automatic winding system introduced in 1959 . Unlike conventional Swiss-style systems that use complex reverser gears, the Magic Lever is a specially shaped double-ended pawl that picks up rotor motion in both clockwise and counterclockwise directions and transfers it efficiently to the winding mechanism . This results in faster winding with fewer parts—a hallmark of Seiko’s “smart simplicity” engineering philosophy .

3. Which movements is this pawl lever compatible with?

This pawl lever is compatible with Seiko NH35, NH36, NH37, NH38, and NH39 movements . These are all based on the same NH35 architecture, with differences in complications (date, day-date, 24-hour indicator, open heart/skeleton) . The Magic Lever winding system is shared across all these calibers .