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Generic replacement circuit block (electronic module) for Hattori VK63 and VK64 meca-quartz chronograph movements. This PCB controls timekeeping and chronograph functions, featuring an AC reset terminal for post-battery-change calibration. Aftermarket replacement for failed or damaged original circuit blocks.
Compatible with VK63 (3‑6‑9 tri‑compax) and VK64 (bi‑compax) meca‑quartz movements
32,768 Hz quartz tuning fork oscillator – precise ±20 sec/month
Integrated AC reset terminal – touch with conductive tweezers to reset after battery change
Controls 2‑pole stepping motor, date display, and mechanical chronograph module
Works with SR936SW/394 battery (approx. 3‑year life)
| Parameter | Value |
|---|---|
| Compatible calibers | Hattori VK63, VK63A, VK64, VK64A |
| Movement type | Meca-quartz (hybrid) |
| Frequency | 32,768 Hz |
| Accuracy | ±20 seconds/month |
| Battery | SR936SW / 394 |
| Battery life | approx. 3 years |
| AC reset | Yes (terminal on circuit block) |
| Material | PCB with electronic components |
| Type | Aftermarket / Generic |
Replacing failed or damaged circuit blocks in VK63/VK64-based meca-quartz chronographs.
Repairing movements with dead quartz oscillator, stepping motor driver failure, or electrical faults.
Professional watch repair and restoration for microbrand and enthusiast watches (Dan Henry 1963, Pagani Design 1782, AVI-8, Autodromo, etc.).
Q1: Genuine Hattori/Seiko part?
No, generic aftermarket replacement.
Q2: Which calibers fit?
VK63, VK63A, VK64, VK64A (all 13.5‴ meca-quartz chronographs).
Q3: How to reset after installation?
Touch the AC terminal (arrow marking on circuit) and switch spring/negative battery terminal with conductive tweezers.
Fast worldwide shipping within 3 business days.
Competitive pricing on Seiko/Hattori calibers.
3,000+ watch movements and parts in stock.
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Personalized sourcing support via [email protected] or WhatsApp +86 18620212114.
