Head-to-Head Comparison

Hamilton Khaki Field Mechanical 38mm vs Orient Kamasu Automatic Diver

Hamilton's field watch meets Orient's diver

Quick Verdict

The Orient Kamasu Automatic Diver ($250–$500) delivers Orient In-House Automatic technology in the tier below the Hamilton Khaki Field Mechanical 38mm ($500–$1,000). The Kamasu Automatic Diver measures 41.8mm and is rated 200m (20 ATM). The Khaki Field Mechanical 38mm justifies its premium with Swiss Made heritage and Hand-Wound H-50 (ETA 2801-2 base). Both represent excellent choices in the luxury watch category.

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Hamilton Khaki Field Mechanical 38mm

Hamilton

Khaki Field Mechanical 38mm

$500–$1,000

Orient Kamasu Automatic Diver

Orient

Kamasu Automatic Diver

$250–$500

Specifications Compared

FeatureHamilton Khaki Field Mechanical 38mmOrient Kamasu Automatic Diver
Price$500–$1,000$250–$500
Case Size38mm41.8mm
MovementHand-Wound H-50 (ETA 2801-2 base)Automatic Caliber F6922
Caliber TypeHamilton/ETA Hand-WoundOrient In-House Automatic
Power Reserve80 Hours40 Hours
Water Resistance50m (5 ATM)200m (20 ATM)
CrystalSapphire CrystalSapphire Crystal
Case MaterialStainless SteelStainless Steel
OriginSwiss MadeMade in Japan

Category-by-Category Analysis

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Design & Aesthetics

Edge: Draw

Hamilton's design language vs Orient's approach

The Hamilton Khaki Field Mechanical 38mm features a Stainless Steel case at 38mm with Sapphire Crystal protection. The Orient Kamasu Automatic Diver offers Stainless Steel construction at 41.8mm with Sapphire Crystal. Both represent their brand's distinct design philosophy and heritage.

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Movement & Performance

Edge: Hamilton

Hand-Wound H-50 (ETA 2801-2 base) vs Automatic Caliber F6922

The Khaki Field Mechanical 38mm runs the Hand-Wound H-50 (ETA 2801-2 base) (Hamilton/ETA Hand-Wound, 80 Hours power reserve) at 21,600 vph (3 Hz) frequency. The Kamasu Automatic Diver uses the Automatic Caliber F6922 (Orient In-House Automatic, 40 Hours reserve) at 21,600 vph (3 Hz). The Khaki Field Mechanical 38mm edges ahead on power reserve.

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Wearability & Fit

Edge: Hamilton

38mm vs 41.8mm — different wrist presence

At 38mm, the Khaki Field Mechanical 38mm wears more compactly on smaller wrists compared to the Kamasu Automatic Diver at 41.8mm. Water resistance differs: 50m (5 ATM) vs 200m (20 ATM).

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Value & Cost of Ownership

Edge: Orient

Orient sits in the lower tier

The Hamilton Khaki Field Mechanical 38mm sits at $500–$1,000 and the Orient Kamasu Automatic Diver at $250–$500. On the specs that outlast any price: the Khaki Field Mechanical 38mm uses Sapphire Crystal with 80 Hours, against Sapphire Crystal and 40 Hours on the Kamasu Automatic Diver. Service intervals are typically 5-7 years for both.

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Water Resistance

Edge: Orient

50m (5 ATM) vs 200m (20 ATM)

The Khaki Field Mechanical 38mm is rated to 50m (5 ATM) while the Kamasu Automatic Diver handles 200m (20 ATM). The Kamasu Automatic Diver offers superior water resistance.

Our Verdict

Hamilton

Khaki Field Mechanical 38mm

Choose the Hamilton Khaki Field Mechanical 38mm if you prioritize Hamilton/ETA Hand-Wound engineering, Swiss Made craftsmanship, and 50m (5 ATM) water resistance. At $500–$1,000, it delivers Hand-Wound H-50 (ETA 2801-2 base) with 80 Hours power reserve.

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Orient

Kamasu Automatic Diver

Choose the Orient Kamasu Automatic Diver if you value Orient In-House Automatic technology, Made in Japan heritage, and 41.8mm proportions. At $250–$500, the Automatic Caliber F6922 with 40 Hours power reserve makes it a compelling choice.

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The Bottom Line

The Hamilton Khaki Field Mechanical 38mm and Orient Kamasu Automatic Diver represent two distinct approaches to fine watchmaking — the Hamilton bringing Swiss Made tradition while Orient delivers Made in Japan engineering.

Frequently Asked Questions

Neither is objectively better — they serve different preferences. The Hamilton Khaki Field Mechanical 38mm ($500–$1,000) offers Hand-Wound H-50 (ETA 2801-2 base) with 80 Hours power reserve, while the Orient Kamasu Automatic Diver ($250–$500) features Automatic Caliber F6922 with 200m (20 ATM) water resistance. Choose based on your priorities: Swiss Made craftsmanship vs Made in Japan engineering.
The Orient Kamasu Automatic Diver offers better upfront value, sitting a tier lower at $250–$500. However, the Hamilton Khaki Field Mechanical 38mm may justify its premium with superior finishing, heritage, or resale value.
Both are suitable for daily wear. The Khaki Field Mechanical 38mm at 38mm with 50m (5 ATM) water resistance handles everyday situations. The Kamasu Automatic Diver at 41.8mm with 200m (20 ATM) is similarly capable. Both use Sapphire Crystal, which resists scratches well.

How This Page Was Made

Our comparisons are generated from a hand-maintained specification database and reviewed under our editorial standards. We use AI tools to assemble pages from that data. We don’t invent specs: every number traces back to the database, and when we correct an entry, the fix is applied site-wide. As an Amazon Associate, The Horologist earns from qualifying purchases.