---
description: Genuine Seiko NH38/NH39 balance complete with stud 0310184. Japanese-made balance assembly for automatic movement repair and restoration.
title: "SEIKO (SII) NH38/NH39 Balance Complete With Stud #0310184 - Sofly"
image: https://www.soflypart.com/wp-content/uploads/2019/06/nh39-balance.jpg
---
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- **SEIKO (SII) NH38/NH39 Balance Complete With Stud #0310184**
[](https://www.soflypart.com/wp-content/uploads/2019/06/nh39-balance.jpg)
[](https://www.soflypart.com/wp-content/uploads/2019/06/nh39b.jpg)
# SEIKO (SII) NH38/NH39 Balance Complete With Stud #0310184
$9.00
You Saved
| Brand | Choose an option SEIKO- 
Clear |
| --- | --- |
### Discount
| Quantity | Discount (%) | Price |
| --- | --- | --- |
| 1 - 2 | — | $9.00 |
| 3 - 4 | 5% | $8.55 |
| 5 - 9 | 7% | $8.37 |
| 10 - 14 | 10% | $8.10 |
| 15+ | 15% | $7.65 |
### Discount
| Quantity | Discount (%) | Price |
| --- | --- | --- |
| 1 - 2 | — | $9.00 |
| 3 - 4 | 5% | $8.55 |
| 5 - 9 | 7% | $8.37 |
| 10 - 14 | 10% | $8.10 |
| 15+ | 15% | $7.65 |
SEIKO (SII) NH38/NH39 Balance Complete With Stud #0310184 quantity
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## Product Description
The **SEIKO (SII) NH38/NH39 Balance Complete With Stud (0310184)** is a genuine Seiko balance assembly for the NH38 and NH39 automatic movements. This complete unit includes the balance wheel, hairspring, and stud, and is factory-assembled in Japan to original Seiko specifications. It is designed for watchmakers to replace a damaged or worn balance during movement servicing or repair.
## Features & Function
- **Genuine Seiko part** – authentic Japanese-made component for NH38 and NH39 movements
- **Complete balance assembly** – includes balance wheel, hairspring, and stud, ready for installation
- **Factory-assembled** – assembled to original Seiko specifications for correct timing
- **Precision-engineered** – manufactured with Seiko’s quality standards for reliable timekeeping
- **Direct replacement** – drop-in replacement for the original balance assembly
## Specifications
- **Part Number**: 0310184
- **Compatible Movements**: Seiko NH38, NH39 (also fits NH35, NH36, NH37 variants according to some sources)
- **Movement Frequency**: 21,600 vibrations per hour (3 Hz)
- **Jewels**: 24 jewels (NH38/NH39)
- **Origin**: Japan (Seiko / TMI)
- **Condition**: Brand new
## Applications
- **Service and overhaul** of Seiko NH38 and NH39 movements
- **Balance assembly replacement** – replacing damaged, broken, or worn balance wheels and hairsprings
- **Timekeeping restoration** – restoring correct amplitude and rate to the movement
- Suitable for **professional watchmakers** and **experienced watch repair technicians**
## FAQs
**1. Is this a genuine Seiko / SII part?**
Yes, this is a **genuine Seiko (TMI) factory part** made in Japan. It is not an aftermarket or generic copy.
**2. Which movements does this balance complete fit?**
It fits **NH38 and NH39** movements. Some references indicate compatibility with **NH35, NH36, and NH37** as well, but the official parts code 0310197 is listed for NH35-37, while 0310198 is for NH38/39.
**3. What is the difference between the balance completes for NH35-37 and NH38-39?**
The difference likely relates to the **balance geometry** associated with the open-heart design of the NH38/NH39 movements.
## 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 **info@soflypart.com** or WhatsApp **+86 18620212114**.
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This complete unit includes the balance wheel, hairspring, and stud, and is factory-assembled in Japan to original Seiko specifications. It is designed for watchmakers to replace a damaged or worn balance during movement servicing or repair. Features & Function Genuine Seiko part\u00a0\u2013 authentic Japanese-made component for NH38 and NH39 movements Complete balance assembly\u00a0\u2013 includes balance wheel, hairspring, and stud, ready for installation Factory-assembled\u00a0\u2013 assembled to original Seiko specifications for correct timing Precision-engineered\u00a0\u2013 manufactured with Seiko's quality standards for reliable timekeeping Direct replacement\u00a0\u2013 drop-in replacement for the original balance assembly Specifications Part Number: 0310184 Compatible Movements: Seiko NH38, NH39 (also fits NH35, NH36, NH37 variants according to some sources) Movement Frequency: 21,600 vibrations per hour (3 Hz) Jewels: 24 jewels (NH38/NH39) Origin: Japan (Seiko / TMI) Condition: Brand new Applications Service and overhaul\u00a0of Seiko NH38 and NH39 movements Balance assembly replacement\u00a0\u2013 replacing damaged, broken, or worn balance wheels and hairsprings Timekeeping restoration\u00a0\u2013 restoring correct amplitude and rate to the movement Suitable for\u00a0professional watchmakers\u00a0and\u00a0experienced watch repair technicians FAQs 1. 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Personalized sourcing support via\u00a0info@soflypart.com\u00a0or WhatsApp\u00a0+86 18620212114.","image":"https://www.soflypart.com/wp-content/uploads/2019/06/nh39-balance-150x150.jpg","offers":{"@type":"Offer","description":"Product Description The\u00a0SEIKO (SII) NH38/NH39 Balance Complete With Stud (0310184)\u00a0is a genuine Seiko balance assembly for the NH38 and NH39 automatic movements. This complete unit includes the balance wheel, hairspring, and stud, and is factory-assembled in Japan to original Seiko specifications. It is designed for watchmakers to replace a damaged or worn balance during movement servicing or repair. Features & Function Genuine Seiko part\u00a0\u2013 authentic Japanese-made component for NH38 and NH39 movements Complete balance assembly\u00a0\u2013 includes balance wheel, hairspring, and stud, ready for installation Factory-assembled\u00a0\u2013 assembled to original Seiko specifications for correct timing Precision-engineered\u00a0\u2013 manufactured with Seiko's quality standards for reliable timekeeping Direct replacement\u00a0\u2013 drop-in replacement for the original balance assembly Specifications Part Number: 0310184 Compatible Movements: Seiko NH38, NH39 (also fits NH35, NH36, NH37 variants according to some sources) Movement Frequency: 21,600 vibrations per hour (3 Hz) Jewels: 24 jewels (NH38/NH39) Origin: Japan (Seiko / TMI) Condition: Brand new Applications Service and overhaul\u00a0of Seiko NH38 and NH39 movements Balance assembly replacement\u00a0\u2013 replacing damaged, broken, or worn balance wheels and hairsprings Timekeeping restoration\u00a0\u2013 restoring correct amplitude and rate to the movement Suitable for\u00a0professional watchmakers\u00a0and\u00a0experienced watch repair technicians FAQs 1. Is this a genuine Seiko / SII part? Yes, this is a\u00a0genuine Seiko (TMI) factory part\u00a0made in Japan. It is not an aftermarket or generic copy. 2. Which movements does this balance complete fit? It fits\u00a0NH38 and NH39\u00a0movements. Some references indicate compatibility with\u00a0NH35, NH36, and NH37\u00a0as well, but the official parts code 0310197 is listed for NH35-37, while 0310198 is for NH38/39. 3. What is the difference between the balance completes for NH35-37 and NH38-39? The difference likely relates to the\u00a0balance geometry\u00a0associated with the open-heart design of the NH38/NH39 movements. 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. 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