Hamilton Khaki Field Mechanical 38mm vs Invicta Pro Diver Automatic 23681
Hamilton's field watch meets Invicta's diver
Quick Verdict
The Invicta Pro Diver Automatic 23681 ($50–$100) delivers Automatic (Seiko NH35A) technology in the tier below the Hamilton Khaki Field Mechanical 38mm ($500–$1,000). The Pro Diver Automatic 23681 measures 40mm and is rated 200m. 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.
Transparency — We earn a small commission on purchases made through our Amazon links. This doesn't affect our editorial independence.
Specifications Compared
| Feature | Hamilton Khaki Field Mechanical 38mm | Invicta Pro Diver Automatic 23681 |
|---|---|---|
| Price | $500–$1,000 | $50–$100 |
| Case Size | 38mm | 40mm |
| Movement | Hand-Wound H-50 (ETA 2801-2 base) | Automatic NH35A |
| Caliber Type | Hamilton/ETA Hand-Wound | Automatic (Seiko NH35A) |
| Power Reserve | 80 Hours | — |
| Water Resistance | 50m (5 ATM) | 200m |
| Crystal | Sapphire Crystal | Mineral Glass |
| Case Material | Stainless Steel | — |
| Origin | Swiss Made | Invicta (Japanese movement) |
Category-by-Category Analysis
Design & Aesthetics
Hamilton's design language vs Invicta's approach
The Hamilton Khaki Field Mechanical 38mm features a Stainless Steel case at 38mm with Sapphire Crystal protection. The Invicta Pro Diver Automatic 23681 offers steel construction at 40mm with Mineral Glass. Both represent their brand's distinct design philosophy and heritage.
Movement & Performance
Hand-Wound H-50 (ETA 2801-2 base) vs Automatic NH35A
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 Pro Diver Automatic 23681 uses the Automatic NH35A (Automatic (Seiko NH35A), standard reserve) at standard. The Khaki Field Mechanical 38mm edges ahead on power reserve.
Wearability & Fit
38mm vs 40mm — different wrist presence
At 38mm, the Khaki Field Mechanical 38mm wears more compactly on smaller wrists compared to the Pro Diver Automatic 23681 at 40mm. Water resistance differs: 50m (5 ATM) vs 200m.
Value & Cost of Ownership
Invicta sits in the lower tier
The Hamilton Khaki Field Mechanical 38mm sits at $500–$1,000 and the Invicta Pro Diver Automatic 23681 at $50–$100. On the specs that outlast any price: the Khaki Field Mechanical 38mm uses Sapphire Crystal with 80 Hours, against Mineral Glass and a standard reserve on the Pro Diver Automatic 23681. Service intervals are typically 5-7 years for both.
Water Resistance
50m (5 ATM) vs 200m
The Khaki Field Mechanical 38mm is rated to 50m (5 ATM) while the Pro Diver Automatic 23681 handles 200m. The Pro Diver Automatic 23681 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.
Check Price on AmazonInvicta
Pro Diver Automatic 23681
Choose the Invicta Pro Diver Automatic 23681 if you value Automatic (Seiko NH35A) technology, Invicta (Japanese movement) heritage, and 40mm proportions. At $50–$100, the Automatic NH35A with ample power reserve makes it a compelling choice.
Check Price on AmazonThe Bottom Line
The Hamilton Khaki Field Mechanical 38mm and Invicta Pro Diver Automatic 23681 represent two distinct approaches to fine watchmaking — the Hamilton bringing Swiss Made tradition while Invicta delivers Invicta (Japanese movement) engineering.
Frequently Asked Questions
More Comparisons
Hamilton Khaki Field Mechanical vs Tissot Le Locle
Wind it yourself, or let it wind itself
Hamilton Khaki Field Mechanical vs Longines HydroConquest
A hand-wound field watch against a 300m Swiss diver
Tag Heuer Carrera Chronograph vs Hamilton Khaki Field Mechanical 38mm
Tag Heuer's chronograph meets Hamilton's field watch
Explore These Watches
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.