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NH05 automatic movement with 3-digit date: why it can revive a stopped watch and which measurements decide the swap
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USD 70.13
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About this product
When a quartz or worn mechanical watch stops, replacing the movement is the labour-saving answer: instead of diagnosing a dying gear train, you drop in a complete new calibre. The NH05 listed here is an automatic movement with a 3-digit calendar, in the NH05/NH05B family that watchmakers treat as a workhorse lineage. Whether it drops into your case is decided by measurements, not by hope: case diameter and the movement holder's diameter (these movements come in standard millimetre sizes), dial feet position or the dial-spacer approach for a dial without feet, hand sizes for the hour, minute and second posts, and whether your dial's date window sits at the position this movement's date ring expects — a 3-digit date wheel will not line up with a case window cut for a different layout. If the current movement still winds and ticks, note that a swap also means re-waterproofing is unlikely without proper tools. Ask the seller to confirm the exact variant (NH05 vs NH05B differ in calendar and stem details) and whether hands and stem are included.
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Pros & cons
Pros
- Full replacement calibre — no gear-train diagnosis, the watch comes back as a complete mechanism
- NH05/NH05B is a widely used automatic family with known parts behavior
- 3-digit calendar matches watches whose window shows 1–31 with a leading position
- Restores sweeping seconds and self-winding without factory service costs
Cons
- Drop-in success depends on case diameter, movement-holder opening, dial feet and hand-post sizes — none are listed here
- A 3-digit date ring only aligns with windows cut for that layout; other date positions will not match
- Whether NH05 or NH05B, and whether hands and stem are included, is not stated — confirm with the seller
- After a swap without workshop tools, original water resistance cannot be restored
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