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Hamilton Khaki Navy Frogman Auto 41mm Mens Watch Black
Ref. H77455330
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Stepping up in the same colour and case shape
The Frogman name traces back to Hamilton's history of supplying military divers, and this generation of it carries that brief seriously. The crown guard — that bridge-shaped steel arch — is borrowed directly from the original design, and it remains the detail that most immediately marks this watch out from a standard screwdown crown. At 13.09mm thick, the case is notably slim for something rated to 300 metres, which means it clears a cuff rather than catching on one, and sits against the wrist without the bulk that serious depth ratings usually demand. The waved rubber strap is functional rather than decorative: the texture gives grip when the wrist is wet and the pin buckle keeps the fit precise under a drysuit sleeve. The H-10 inside runs on a Nivachron balance spring — an alloy that resists both magnetic fields and temperature swings, which matters on a watch likely to be worn near compasses, computers and cold water. The 80-hour power reserve, displayed on the dial, means a weekend away need not involve remembering to wind it on Friday night.
- Reference
- H77455330
- Brand
- Hamilton
- Collection
- Khaki Navy
- Case size
- 41mm
- Case thickness
- 13.09mm
- Lug width
- 20mm
- Case material
- Stainless steel
- Case shape
- Round
- Dial
- Black
- Crystal
- Sapphire
- Movement
- Automatic
- Calibre
- H-10
- Functions
- Power reserve indicator
- Water resistance
- 300m
- Bracelet / strap
- Rubber strap
- Strap colour
- Black
- 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 Khaki Navy range (8), Back in Stock (3,988), Stainless Steel Watches (2,814), Automatic Watches (1,546), Sports Watches (700) and Dive Watches (494).
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What the specifications mean
A mechanical watch built to be worn hard and got wet.
Strengths
- 300m water resistance, rated for actual diving
- Sapphire crystal, which resists scratching
- 80-hour reserve survives a weekend off the wrist
- Luminous hands and markers for low light
Hamilton Khaki Navy Frogman Auto alternatives
Watches from other brands at a similar price, style and size, so you can see what else your budget can buy.
| Specification | H77455330 | T1454079705702 | C0484071101100 |
|---|---|---|---|
| Price | £915 | £960 | £830 |
| Case size | 41mm | 41mm | 40.5mm |
| Water resistance | 300m | 300m | 300m |
| Movement | Automatic | Automatic | Automatic |
| Strap | Rubber strap | Rubber strap | Stainless steel bracelet |
| Power reserve | 80 hours | 80 hours | 80 hours |
| This watch | Closely matched | Closely matched |
Your new watch
Frequently asked questions, and things you should know about this watch
Can I swim with it?
Yes. At 300m it is rated for swimming, snorkelling and recreational diving.
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.
Cheapest place to buy
Both Mappin & Webb and Goldsmiths list it at £915, so choose on delivery and warranty rather than price.
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