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Hamilton Jazzmaster Open Heart 40mm Mens Watch Blue
Ref. H32675540
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The Jazzmaster line has long been Hamilton's home for watches that lean towards the dressy side without committing entirely to formality, and the Open Heart takes that a step further by cutting away part of the dial to expose the movement beneath. The aperture is not decorative in the way a printed pattern might be — the balance wheel actually moves, and on this version the smoked blue sunburst dial gives it a depth that plain white or black dials on the same model do not quite manage. The H-10 movement inside is built to an 80-hour power reserve, which means a watch left on the nightstand Friday evening is still running Monday morning. The Nivachron balance spring resists magnetic fields without needing a soft-iron cage, keeping the case trim at just over 11mm — slim enough on a 40mm case that it sits closer to a dress watch than most automatics with this much going on inside. The see-through caseback lets the same view continue from the reverse. Brown calfskin against the silver case and blue dial is a combination that ages in the owner's favour: the strap softens and takes on character while the dial stays clean.
- Reference
- H32675540
- Brand
- Hamilton
- Collection
- Jazzmaster
- Case size
- 40mm
- Case thickness
- 11.05mm
- Lug width
- 20mm
- Case material
- Stainless steel
- Case shape
- Round
- Dial
- Blue
- Crystal
- Sapphire
- Movement
- Automatic
- Calibre
- H-10
- Functions
- Skeleton dial
- Water resistance
- 50m
- Bracelet / strap
- Leather strap
- Strap colour
- Brown
- Clasp
- Buckle
- Lume
- Luminous
- Retailer
- Mappin & Webb
Additional specifications
- Power reserve
- 80 hours
- Origin
- Swiss made
Learn more about Hamilton
Hamilton was founded in Lancaster, Pennsylvania in 1892, and its early business was the railroad. American rail accidents caused by unsynchronised timekeeping had forced the industry to adopt strict standards, and Hamilton built pocket watches accurate enough to meet them — earning the description the watch of railroad accuracy.
Two things then defined it. The first was war: Hamilton supplied over a million watches to American forces in the Second World War, suspending civilian production entirely, and its marine chronometers were fitted across the US Navy.
The second was electricity. The Ventura of 1957 was the first battery-powered electric wristwatch, and its asymmetric shield-shaped case, designed by Richard Arbib, looked like nothing before it. Elvis Presley wore one in Blue Hawaii.
Hamilton's cinematic presence is unusually deep — over five hundred films — and includes the watches designed for 2001: A Space Odyssey with Stanley Kubrick, and appearances in Interstellar and Tenet.
American manufacturing ended in 1969 as the quartz crisis approached. The brand was acquired by the Swiss and is now part of the Swatch Group, based in Biel, where it occupies a distinctive position: American design heritage, Swiss production, and ETA movements with long power reserves at accessible prices. The Khaki Field, descended from the wartime issue watches, is its best-known line.
- 1892
- Founded in Lancaster, Pennsylvania.
- 1918
- Supplies the first US airmail flights.
- 1957
- The Ventura is the first electric wristwatch.
- 1968
- Designs the watches for 2001: A Space Odyssey.
- 1974
- Becomes Swiss-owned; now part of the Swatch Group.
Also in 7 collections
This watch appears in the Hamilton Jazzmaster range (16), Back in Stock (3,460), Stainless Steel Watches (2,531), Automatic Watches (1,573), Leather Strap Watches (854), Blue Dial Watches (701) and Dress Watches (462).
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What the specifications mean
A mechanical watch for everyday wear.
Strengths
- 40mm suits most wrists
- Sapphire crystal, which resists scratching
- 80-hour reserve survives a weekend off the wrist
- Luminous hands and markers for low light
Worth knowing
- 50m suits rain and handwashing, not swimming
Hamilton Jazzmaster Open Heart alternatives
Watches from other brands at a similar price, style and size, so you can see what else your budget can buy.
| Specification | H32675540 | FC-303NS5B6 | T1379079720100 |
|---|---|---|---|
| Price | £990 | £1,095 | £960 |
| Case size | 40mm | 40mm | 40mm |
| Water resistance | 50m | 50m | 100m |
| Movement | Automatic | Automatic | Automatic |
| Strap | Leather strap | Leather strap | Silicone strap |
| Power reserve | 80 hours | 38 hours | 80 hours |
| This watch | Closely matched |
|
Your new watch
Frequently asked questions, and things you should know about this watch
Can I swim with it?
Showering yes, swimming no. 50m covers splashes and brief immersion, but a swimming stroke generates well above the pressure that figure describes.
Water resistance explainedWill the glass scratch?
Unlikely. Sapphire is second only to diamond in hardness and shrugs off everyday marking.
Sapphire, mineral and acrylic comparedDoes it need a battery?
No. It is automatic — the motion of your wrist winds it, and there is no cell to replace.
Quartz, automatic and solar comparedHow long does it run for when it's not worn?
About 80 hours fully wound — enough to sit off the wrist over a weekend and still be running.
What size strap does it take?
20mm. Any strap of that width will fit, and on most modern watches quick-release bars make the swap a two-minute job with no tools.
Is it a men's or women's watch?
Listed as men's, though at 40mm it sits in the range that suits anyone.
Cheapest place to buy
Both Mappin & Webb and Goldsmiths list it at £990, so choose on delivery and warranty rather than price.
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