Quick Verdict
The Khaki Field Mechanical is the most focused watch in this database. No date, no automatic rotor, no bracelet — a 38 mm hand-wound field watch with sapphire, 9.5 mm of height and an 80-hour reserve. Everything Hamilton removed is the reason it works.
At a Glance
- Street price
- $675
- Movement type
- Hand-wound
- Power reserve
- 80 hours
- Case diameter
- 38 mm
- Lug-to-lug
- 47 mm
- Crystal
- Sapphire
- Water resistance
- 50 m (164 ft)
Design
A faithful reading of the mid-century military specification: matte dial, painted Arabic numerals, an inner 24-hour track and a stubby knurled crown. There is no date window, which keeps the layout symmetrical and is a large part of why the dial reads so cleanly.
Movement
The H-50 is hand-wound, with an 80-hour reserve and a Nivachron balance spring — an anti-magnetic alloy Hamilton normally reserves for watches costing considerably more, and a genuine advantage for anyone who spends their day near a laptop. There is no rotor, which is the direct reason the case is only 9.5 mm tall.
Build Quality
Fully brushed steel with a sapphire crystal and a push-pull crown, which caps water resistance at 50 m. The construction is simple by design; there is very little here to fail.
Dial
Matte and deliberately non-reflective, with luminous fill on the numerals and hands. It is the most legible dial in this database in daylight and one of the plainest, which is the point.
Bracelet & Strap
A green NATO textile strap on a 20 mm lug width. A single-pass NATO adds a millimetre or two of height on the wrist and is the period-correct choice for a field watch; a leather strap sits lower if you prefer it.
Comfort & Wearability
At 9.5 mm on a textile strap this is the easiest watch here to wear all day — Hamilton does not publish a weight, but a 38 mm steel case with no bracelet is about as light as a mechanical watch gets. The one figure to check is the 47 mm lug-to-lug, which is long for a 38 mm case and will overhang wrists below about 6.25 inches.
Accuracy
Hamilton does not publish a rate specification for the H-50. What it does publish is the 80-hour reserve, which in a hand-wound watch means it survives a weekend in a drawer.
What we like
What we like
- 80-hour reserve from a hand-wound Swiss movement
- 9.5 mm case height, the thinnest watch in this database
- Sapphire crystal and a properly matte, non-reflective dial
- No date window, so the dial layout stays symmetrical
What we don't like
- 50 m water resistance with a push-pull crown
- Hand-winding is a daily requirement, not an option
- 47 mm lug-to-lug is long relative to the 38 mm case
Who Should Buy It?
Anyone who wants a Swiss mechanical watch that disappears on the wrist, anyone with a smaller wrist, and anyone who actively enjoys winding a watch each morning.
Who Should Skip It?
Skip it if you will not remember to wind it, or if the watch has to go swimming. Skip it if you need a date.
Best Alternatives
Three watches worth weighing up before you commit.
How It Compares
Hamilton Khaki Field Mechanical 38mm
3 categories won
Hamilton Khaki Field Automatic 38mm
1 categories won
- Street price
- $675Winner
- $745
- Movement type
- Hand-wound
- Automatic
- Caliber
- H-50
- H-10
- Power reserve
- 80 hoursEven
- 80 hoursEven
- Stated accuracy
- Not published
- Not published
- Case diameter
- 38 mm
- 38 mm
- Case thickness
- 9.5 mmWinner
- 11 mm
- Lug-to-lug
- 47 mmEven
- 47 mmEven
- Crystal
- SapphireEven
- SapphireEven
- Water resistance
- 50 m (164 ft)
- 100 m (328 ft)Winner
- Bracelet / strap
- Green NATO textile strap
- Brown cow leather strap (strap reference H6007041041)
- Weight
- Not published
- 72 g
- Style
- Field · Everyday
- Field · Everyday
- Recommended wrist
- Small · Medium
- Small · Medium
- Selection Score
- 86 / 100Winner
- 85 / 100
Final Verdict
The best-executed field watch under $600 and the most comfortable watch in this database. It asks something of its owner every day, and that is either the appeal or the deal-breaker.
Specifications
- Brand
- Hamilton
- Model
- Khaki Field Mechanical 38mm
- Reference
- H69439931
- Collection
- Khaki Field
- Street price
- $675
- MSRP
- $675
- Movement type
- Hand-wound
- Movement
- Hamilton H-50
- Caliber
- H-50
- Power reserve
- 80 hours
- Stated accuracy
- Not published
- Balance spring
- Nivachron
- Case diameter
- 38 mm
- Case thickness
- 9.5 mm
- Lug-to-lug
- 47 mm
- Lug width
- 20 mm
- Weight
- Not published
- Case material
- Stainless steel
- Crystal
- Sapphire
- Water resistance
- 50 m (164 ft)
- Dial colours
- Black
- Bracelet / strap
- Green NATO textile strap
- Bracelet material
- Textile
- Clasp
- Pin buckle, 20 mm
- Date
- No
- GMT
- No
- Chronograph
- No
- Style
- Field · Everyday
- Recommended wrist
- Small · Medium
- Country of origin
- Switzerland
- Released
- 2018
- Selection Score
- 86 / 100
Score Breakdown
- 25%21.5
Value
- 20%18.0
Movement
- 15%13.2
Build Quality
- 15%13.5
Design
- 10%9.4
Wearability
- 10%6.5
Features
- 5%4.3
Brand & Ownership
Seven pillars, each rated 0–10 and weighted as shown. The total is the sum of the weighted ratings — the headline number can never disagree with its own breakdown.
Ratings are demo data pending editorial review.
Where to Buy
Selection Time is reader-supported. If you buy through a link on this page we may earn a commission. This never affects our scores or what we recommend.
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Hamilton
$675 · Price checked August 29, 2026
Frequently Asked Questions
How often does a hand-wound watch need winding?
Daily is the usual habit, though the H-50's 80-hour reserve means it will run for more than three days from a full wind.
Is there an automatic version?
Yes. The Khaki Field Automatic uses the H-10 caliber, adds a date and 100 m of water resistance, and is a little over a millimetre thicker.
