Hamilton Khaki Field Mechanical 38mm vs Longines Master Collection Moonphase

Hamilton's design language vs Longines's approach

The Hamilton Khaki Field Mechanical 38mm features a Stainless Steel case at 38mm with Sapphire Crystal protection. The Longines Master Collection Moonphase offers Stainless Steel construction at 40mm with Sapphire Crystal. Both represent their brand's distinct design philosophy and heritage.

Hand-Wound H-50 (ETA 2801-2 base) vs Automatic Caliber L899

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 Master Collection Moonphase uses the Automatic Caliber L899 (Automatic (ETA A31.L91 base), 72 Hours reserve) at 25,200 vph (3.5 Hz). The Khaki Field Mechanical 38mm edges ahead on power reserve.

38mm vs 40mm — different wrist presence

At 38mm, the Khaki Field Mechanical 38mm wears more compactly on smaller wrists compared to the Master Collection Moonphase at 40mm. Water resistance differs: 50m (5 ATM) vs 30m (3 ATM).

Hamilton sits in the lower tier

The Hamilton Khaki Field Mechanical 38mm sits at $500–$1,000 and the Longines Master Collection Moonphase at $2,500–$5,000. On the specs that outlast any price: the Khaki Field Mechanical 38mm uses Sapphire Crystal with 80 Hours, against Sapphire Crystal and 72 Hours on the Master Collection Moonphase. Service intervals are typically 5-7 years for both.

50m (5 ATM) vs 30m (3 ATM)

The Khaki Field Mechanical 38mm is rated to 50m (5 ATM) while the Master Collection Moonphase handles 30m (3 ATM). The Khaki Field Mechanical 38mm is better suited for water activities.