Hamilton H-21
Quick answer
What is the Hamilton H-21?
H-21 is a Hamilton/Swatch Group caliber based on the Valjoux 7753 with extended 60-hour power reserve.
- Jewels
- 25
- Power reserve
- 60h
- Linked watches
- 0
Why this movement matters
Power reserve
60 hours means you can take the watch off over a weekend and it will usually still be running Monday morning.
Frequency
28,800 beats/hour / 4 Hz is a common modern automatic rate. Higher frequency can improve stability in some conditions, but service access and long-term ownership matter more than Hz alone.
Serviceability
Excellent. Valjoux 7753 platform is widely serviceable by independent watchmakers. Swatch Group service infrastructure provides affordable authorised options. Typical service £250 to £500.
Movement honesty
Movement honesty classification pending editorial review.
Technical specifications
About this movement
H-21 is a Hamilton/Swatch Group caliber based on the Valjoux 7753 with extended 60-hour power reserve. Not in-house in the manufacture sense, but a proven chronograph base with Swatch Group regulation and transparent sourcing.
Serviceability
Excellent. Valjoux 7753 platform is widely serviceable by independent watchmakers. Swatch Group service infrastructure provides affordable authorised options. Typical service £250 to £500.
Best watches using this movement
WatchIntel linked watches
Published references in our database. This list is not complete.
Compared with similar movements
Similar movement comparisons pending editorial review.
Frequently asked questions
What is the Hamilton H-21?+
Hamilton H-21 is a Hamilton caliber (H-21). H-21 is a Hamilton/Swatch Group caliber based on the Valjoux 7753 with extended 60-hour power reserve. Not in-house in the manufacture sense, but a proven chronograph base with Swatch Group regulation and transparent sourcing.
What is the Hamilton H-21 based on?+
The architecture traces to Valjoux 7753. WatchIntel classifies lineage separately from marketing "in-house" claims.
What are the key specs of the Hamilton H-21?+
Core specs: 25 jewels, 60-hour power reserve, automatic. See the technical specifications table for escapement, certification, and functions.
How easy is it to service the Hamilton H-21?+
Excellent. Valjoux 7753 platform is widely serviceable by independent watchmakers. Swatch Group service infrastructure provides affordable authorised options. Typical service £250 to £500.
Which watches use the Hamilton H-21?+
No published watches are linked to this movement in WatchIntel yet.
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