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This is a genuine hour wheel designed for the TMI/Seiko VK63 quartz chronograph movement, made in Japan and brand new. The VK63 belongs to the “Meca-Quartz” (mechanical-quartz hybrid) movement family, with its hour wheel working within the standard timekeeping system to drive the center hour hand for current time indication.
As an original factory part, this product is the ideal choice for replacing worn hour wheels during service or repair.
VK63 Technical Background :
| Parameter | Value |
|---|---|
| Movement Type | Meca-Quartz (quartz timekeeping + mechanical chronograph module) |
| Size | 13 1/2‴ (30.80 × 29.10 mm) |
| Height | 5.10 mm |
| Jewels | 0 |
| Battery | 394 |
| Hand Sizes | Hour 1.50 mm / Minute 0.90 mm / Chrono seconds 0.32 mm |
| Functions | Hours, minutes, small seconds, date, center chronograph seconds, 60-minute counter, 24-hour indicator |
| Instruction | Details |
|---|---|
| Normal Operation | The hour wheel is driven by the timekeeping gear train, rotating the center hour hand once every 12 hours |
| Time Setting | Pull crown to second click position, rotate crown to set hour and minute hands |
| Setting Caution | After adjustment, push crown back to normal position to ensure water resistance |
| Failure Symptoms | Worn hour wheel causes: hour hand stops, jumps erratically, or inaccurate time display |
1. Remove Movement Open the case back and carefully remove the VK63 movement
2. Remove Hands Carefully remove hour, minute, and sub-dial hands
3. Remove Dial Remove the dial to expose the gear train
4. Remove Hour Wheel Carefully remove the old hour wheel
5. Cleaning Clean the hour wheel mounting area and related gears – remove debris
6. Install New Hour Wheel Place the new hour wheel in position – ensure proper meshing with the pinion
7. Assemble & Test Reinstall dial and hands. Pull crown to 2nd position and rotate to test hand synchronization
Note: The VK63 hour wheel installation is similar to other quartz movements, but due to the compact movement construction, careful alignment is required .
| Aspect | Guidance |
|---|---|
| Inspection Period | Check hour wheel for wear during each battery change (approx. 3 years) |
| Wear Indicators | Worn hour wheel causes: hour hand stops, jumps, or desynchronization when setting time |
| Common Issues | For time display issues, first check the hour wheel, then the minute wheel for sticking |
| Battery Replacement | Use 394 battery . After battery change, reset chronograph if needed |
| Cleaning Method | Use dust blower to clean movement surface; avoid liquid cleaners |
| Replacement Interval | Replace only when hour wheel is damaged or wear significantly affects timekeeping |
Q1: Is the VK63 a mechanical or quartz movement?
A: The VK63 is a hybrid “Meca-Quartz” movement. It uses a quartz crystal for timekeeping accuracy (standard quartz function) but has a mechanical module for the chronograph to give it a smooth, mechanical-like sweep .
Q2: What is the hour hand size for the VK63?
A: The VK63 uses an hour hand with a 1.50mm inner diameter (hole size) .
Q3: Can I replace the hour wheel myself?
A: Hour wheel replacement requires movement disassembly and careful handling. If you have experience with quartz movement repair, it is possible. However, professional installation by a watchmaker is recommended for those without experience.
Q4: What are the common symptoms of a damaged hour wheel?
A: Common symptoms include: the hour hand does not move when setting time, the hour hand moves erratically or jumps, or the time display is inaccurate.
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