Hamilton Khaki Field Automatic vs Longines HydroConquest Automatic
Hamilton's field watch meets Longines's diver
Quick Verdict
The Hamilton Khaki Field Automatic ($500–$1,000) offers Automatic (ETA C07.611 base) precision in the tier below the Longines HydroConquest Automatic ($1,500–$2,500). The Khaki Field Automatic measures 38mm and is rated 100m (10 ATM). The HydroConquest Automatic counters with Swiss Made craftsmanship and 300m (30 ATM) water resistance. Both are exceptional watches for their respective tiers.
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Specifications Compared
| Feature | Hamilton Khaki Field Automatic | Longines HydroConquest Automatic |
|---|---|---|
| Price | $500–$1,000 | $1,500–$2,500 |
| Case Size | 38mm | 41mm |
| Movement | Automatic H-10 | Automatic L888.5 |
| Caliber Type | Automatic (ETA C07.611 base) | ETA-Based Automatic with Silicon Balance Spring |
| Power Reserve | 80 Hours | 72 Hours |
| Water Resistance | 100m (10 ATM) | 300m (30 ATM) |
| Crystal | Sapphire Crystal | Sapphire with Anti-Reflective Coating |
| Case Material | Stainless Steel | Stainless Steel |
| Origin | Swiss Made | Swiss Made |
Category-by-Category Analysis
Design & Aesthetics
Hamilton's design language vs Longines's approach
The Hamilton Khaki Field Automatic features a Stainless Steel case at 38mm with Sapphire Crystal protection. The Longines HydroConquest Automatic offers Stainless Steel construction at 41mm with Sapphire with Anti-Reflective Coating. Both represent their brand's distinct design philosophy and heritage.
Movement & Performance
Automatic H-10 vs Automatic L888.5
The Khaki Field Automatic runs the Automatic H-10 (Automatic (ETA C07.611 base), 80 Hours power reserve) at 21,600 vph (3 Hz) frequency. The HydroConquest Automatic uses the Automatic L888.5 (ETA-Based Automatic with Silicon Balance Spring, 72 Hours reserve) at 25,200 vph (3.5 Hz). The Khaki Field Automatic edges ahead on power reserve.
Wearability & Fit
38mm vs 41mm — different wrist presence
At 38mm, the Khaki Field Automatic wears more compactly on smaller wrists compared to the HydroConquest Automatic at 41mm. Water resistance differs: 100m (10 ATM) vs 300m (30 ATM).
Value & Cost of Ownership
Hamilton sits in the lower tier
The Hamilton Khaki Field Automatic sits at $500–$1,000 and the Longines HydroConquest Automatic at $1,500–$2,500. On the specs that outlast any price: the Khaki Field Automatic uses Sapphire Crystal with 80 Hours, against Sapphire with Anti-Reflective Coating and 72 Hours on the HydroConquest Automatic. Service intervals are typically 5-7 years for both.
Water Resistance
100m (10 ATM) vs 300m (30 ATM)
The Khaki Field Automatic is rated to 100m (10 ATM) while the HydroConquest Automatic handles 300m (30 ATM). The HydroConquest Automatic offers superior water resistance.
Materials Face-Off
| Component | Hamilton Khaki Field Automatic | Longines HydroConquest Automatic |
|---|---|---|
| Case | Stainless steel, brushed finish. Hamilton does not publish the alloy grade for this reference. | Zirconium oxide (ZrO₂) with engraved and paint-filled 60-minute dive scale Mohs 8.5 |
| Crystal | Verneuil-grown sapphire, single-side AR coating. | Flat sapphire with anti-reflective coating on the underside Mohs 9 |
| Lume | Super-LumiNova on the hands and hour numerals. Hamilton lists "Super Luminova: Yes" for this reference and does not publish a grade, so none is claimed here. | Si hairspring in the L888.5 caliber — introduced 2020 across the HydroConquest line |
| Strap | Full-grain leather (varies by reference). | Brushed flanks with polished bevel edges — mixed finishing for visual depth |
| Super-LumiNova | — | Applied to sword-style hands and all hour indices |
Cost of Ownership Compared
The Hamilton Khaki Field Automatic saves you $1,363 over 5 years of ownership
Who Should Pick Which
Pick the Hamilton Khaki Field Automatic if…
- Strong value proposition under $1,000 with quality construction
- Active lifestyle wearers — 100m water resistance handles swimming and water sports
- Weekend warriors — 80-hour power reserve means it survives two days off the wrist
- Those who prioritize scratch resistance — sapphire crystal
- Military/field watch enthusiasts who value legibility and durability
Pick the Longines HydroConquest Automatic if…
- Best-in-class 72-hour power reserve at sub-$2,000
- Silicon hairspring antimagnetic protection at an accessible price
- Swiss heritage enthusiasts — Longines' 1832 founding and Olympic/aviation history
- Legitimate 300m dive capability with everyday wearability
- Value seekers — at grey-market pricing the spec-per-dollar is nearly unbeatable
Hamilton Khaki Field Automatic
- Same H-10 / C07 movement as Tissot PRX and Mido — paying brand premium for the Hamilton heritage
- 3 Hz "slow" seconds beat (visible 6 ticks/sec vs. 8)
- Strap quality is adequate, not exceptional
- No hacking, but movement is auto-only (no hand-wind on the 80h variant — older H-30 caliber refs had it)
Longines HydroConquest Automatic
- ETA-base movement at this price — excellent but not "in-house" in the purist sense
- 21mm lug width — awkward for aftermarket straps (most are 20mm or 22mm)
- 25,200 vph (3.5 Hz) — seconds hand sweep is less smooth than 28,800 vph competitors
- Not COSC-certified — no chronometer guarantee (unlike Tudor or Omega at similar prices)
Our Verdict
Hamilton
Khaki Field Automatic
Choose the Hamilton Khaki Field Automatic if you prioritize Automatic (ETA C07.611 base) engineering, Swiss Made craftsmanship, and 100m (10 ATM) water resistance. At $500–$1,000, it delivers Automatic H-10 with 80 Hours power reserve.
Check Price on AmazonLongines
HydroConquest Automatic
Choose the Longines HydroConquest Automatic if you value ETA-Based Automatic with Silicon Balance Spring technology, Swiss Made heritage, and 41mm proportions. At $1,500–$2,500, the Automatic L888.5 with 72 Hours power reserve makes it a compelling choice.
Check Price on AmazonThe Bottom Line
The Hamilton Khaki Field Automatic and Longines HydroConquest Automatic represent two distinct approaches to fine watchmaking — the Hamilton bringing Swiss Made tradition while Longines delivers Swiss Made engineering.
Frequently Asked Questions
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