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Hamilton Jazzmaster Open Heart 40mm Mens Watch Green
Ref. H32675560
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Stepping up in Hamilton's range
The Jazzmaster line has always occupied a particular place in Hamilton's catalogue — dressed up enough for a dinner table, grounded enough to wear daily without ceremony. This Open Heart variant takes that brief and cuts a window into it, letting the H-10 movement show through a smoked green dial that shifts between translucency and depth depending on the light. The H-10 is Hamilton's own calibre, built with an 80-hour power reserve and a Nivachron balance spring that shrugs off magnetic fields — which matters more than it once did, given how many everyday environments generate them. At 40mm with an 11.05mm profile, it sits neatly on a range of wrists without the thickness that skeleton dials sometimes carry as a penalty for their architecture. The brown leather on a silver steel case is a considered pairing: it pushes the watch toward the warmer end of the palette, which works well against the green. The transparent caseback means the movement is visible from both sides, and the 80-hour reserve gives it the better part of a long weekend unworn before it needs winding.
- Reference
- H32675560
- Brand
- Hamilton
- Collection
- Jazzmaster
- Case size
- 40mm
- Case thickness
- 11.05mm
- Lug width
- 20mm
- Case material
- Stainless steel
- Case shape
- Round
- Dial
- Green
- 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
- Goldsmiths
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 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), Dress Watches (462) and Green Dial Watches (339).
Manufacturer’s guarantee
Best of 2 retailers
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 | H32675560 | 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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