---
description: Genuine TMI/Seiko VD78 hour wheel for quartz movement. Motion work component restores hour hand function. Japanese quality.
title: TMI/Hattori SEIKO VD78 Movement Hour Wheel - Sofly
image: https://www.soflypart.com/wp-content/uploads/2019/05/VD78H.jpg
---
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- **TMI/Hattori SEIKO VD78 Movement Hour Wheel**
[](https://www.soflypart.com/wp-content/uploads/2019/05/VD78H.jpg)
# TMI/Hattori SEIKO VD78 Movement Hour Wheel
$1.00
You Saved
| Brand | Choose an option TMI- 
Clear |
| --- | --- |
### Discount
| 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 |
### Discount
| 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 |
TMI/Hattori SEIKO VD78 Movement Hour Wheel quantity
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## Product Description
The **TMI/Seiko VD78 Movement Hour Wheel** is a genuine Japanese-made component for the VD78 quartz movement. This movement is a 10½ ligne (approx. 22.6mm) caliber featuring a **small seconds subdial at the 6 o’clock position**. As part of the motion work, the hour wheel works with the minute wheel to drive the **hour hand** for accurate time display. This genuine TMI/Seiko part is essential for watchmakers restoring proper timekeeping function when the original component becomes worn or damaged.
## Features & Function
- **Genuine TMI/Seiko part** – authentic Japanese-made component for the VD78 movement
- **Motion work component** – works with the minute wheel to drive the hour hand for accurate timekeeping
- **Compact design** – designed for slim 3.45mm quartz movements
- **Essential for service** – commonly replaced when hour hand operation becomes irregular
## Specifications
- **Compatible Movement**: TMI/Seiko VD78
- **Movement Size**: 10½ ligne (approx. 22.6mm)
- **Movement Height**: 3.45mm
- **Hour Wheel Height**: 1.12mm over dial seat
- **Hand Sizes**: Hour: 1.20mm / Minute: 0.70mm / Small seconds: 0.21mm
- **Subdial Position**: Small seconds at 6 o’clock
- **Battery**: 377 / SR626SW
- **Origin**: Japan
## Applications
- **Service and repair** – replacing worn or damaged hour wheels in VD78 movements
- **Motion work restoration** – ensuring smooth and accurate hand alignment
- Suitable for **professional watchmakers** and **experienced repair technicians**
## FAQs
**1. Is this a genuine TMI/Seiko part?**
Yes, this is a **genuine Seiko (TMI) factory part** made in Japan. The VD78 is a quartz movement manufactured by Time Module Inc. (TMI) and used in many watch brands.
**2. What is the function of the hour wheel?**
The hour wheel is part of the **motion work** that drives the hour hand. In the VD78 movement, it works with the minute wheel to ensure accurate time display, with the small seconds hand located at the 6 o’clock subdial.
**3. What are the signs that the hour wheel needs replacement?**
Common signs include **hour hand not advancing correctly**, **misalignment between hour and minute hands**, 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 **info@soflypart.com** or WhatsApp **+86 18620212114**.
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This genuine TMI/Seiko part is essential for watchmakers restoring proper timekeeping function when the original component becomes worn or damaged. Features & Function Genuine TMI/Seiko part\u00a0\u2013 authentic Japanese-made component for the VD78 movement Motion work component\u00a0\u2013 works with the minute wheel to drive the hour hand for accurate timekeeping Compact design\u00a0\u2013 designed for slim 3.45mm quartz movements Essential for service\u00a0\u2013 commonly replaced when hour hand operation becomes irregular Specifications Compatible Movement: TMI/Seiko VD78 Movement Size: 10\u00bd ligne (approx. 22.6mm) Movement Height: 3.45mm Hour Wheel Height: 1.12mm over dial seat Hand Sizes: Hour: 1.20mm / Minute: 0.70mm / Small seconds: 0.21mm Subdial Position: Small seconds at 6 o'clock Battery: 377 / SR626SW Origin: Japan Applications Service and repair\u00a0\u2013 replacing worn or damaged hour wheels in VD78 movements Motion work restoration\u00a0\u2013 ensuring smooth and accurate hand alignment Suitable for\u00a0professional watchmakers\u00a0and\u00a0experienced repair technicians FAQs 1. 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Features & Function Genuine TMI/Seiko part\u00a0\u2013 authentic Japanese-made component for the VD78 movement Motion work component\u00a0\u2013 works with the minute wheel to drive the hour hand for accurate timekeeping Compact design\u00a0\u2013 designed for slim 3.45mm quartz movements Essential for service\u00a0\u2013 commonly replaced when hour hand operation becomes irregular Specifications Compatible Movement: TMI/Seiko VD78 Movement Size: 10\u00bd ligne (approx. 22.6mm) Movement Height: 3.45mm Hour Wheel Height: 1.12mm over dial seat Hand Sizes: Hour: 1.20mm / Minute: 0.70mm / Small seconds: 0.21mm Subdial Position: Small seconds at 6 o'clock Battery: 377 / SR626SW Origin: Japan Applications Service and repair\u00a0\u2013 replacing worn or damaged hour wheels in VD78 movements Motion work restoration\u00a0\u2013 ensuring smooth and accurate hand alignment Suitable for\u00a0professional watchmakers\u00a0and\u00a0experienced repair technicians FAQs 1. 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