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Hamilton Jazzmaster Open Heart Auto 40mm Mens Watch
Ref. H32675581
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Stepping up in the same colour and case shape
The Jazzmaster line has long been Hamilton's answer to the dress watch, and the Open Heart variant takes that brief in a particular direction: rather than closing off the movement behind a finished dial, it cuts an aperture above the balance wheel, letting the oscillation show through. The grey gradient finish on the surrounding dial is purposeful — the smoky sunray graduation frames the opening and draws the eye inward without the dial feeling busy. At 11.1mm thick, it wears closer to the wrist than most dress watches with skeleton work, which often run deeper to accommodate the display. The H-10 inside is Hamilton's own take on the ETA A31, built around a Nivachron balance spring that resists both magnetic fields and temperature variation better than traditional alloys — useful in the everyday environments a watch like this actually meets. The 80-hour power reserve means a watch worn Monday to Friday will survive the weekend without winding, and the exhibition caseback makes the rotor worth looking at.
- Reference
- H32675581
- Brand
- Hamilton
- Collection
- Jazzmaster
- Case size
- 40mm
- Case thickness
- 11.1mm
- Lug width
- 20mm
- Case material
- Stainless steel
- Case shape
- Round
- Dial
- Black
- Crystal
- Sapphire
- Movement
- Automatic
- Functions
- Skeleton dial
- Water resistance
- 50m
- Bracelet / strap
- Leather strap
- Strap colour
- Brown
- Clasp
- Buckle
- Lume
- Super-LumiNova
- Retailer
- Mappin & Webb
Additional specifications
- Power reserve
- 80 hours
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 6 collections
This watch appears in the Hamilton Jazzmaster range (16), Stainless Steel Watches (2,531), Automatic Watches (1,573), Leather Strap Watches (854), Dress Watches (462) and Skeleton Watches (248).
Manufacturer’s guarantee
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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 Auto alternatives
Watches from other brands at a similar price, style and size, so you can see what else your budget can buy.
| Specification | H32675581 | 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 Goldsmiths and Mappin & Webb list it at £990, so choose on delivery and warranty rather than price.
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