Hamilton Khaki Navy GMT Reference H77615333
GMT / Travel - Pilot and Marine crossover · Hamilton (The Swatch Group). Positioned as a mid-range entry-luxury brand with high heritage value in military and aviation history.
Period: Modern Tool Watch (2000s-Present). Stylistic indicators include the oversized triple crowns, internal rotating city bezel, and high-contrast 'field-style' dial layout.
Type
GMT / Travel - Pilot and Marine crossover
Brand
Hamilton (The Swatch Group). Positioned as a mid-range entry-luxury brand with high heritage value in military and aviation history.
Movement
Automatic, Caliber ETA 2893-2. Frequency: 28,800 bph. Power Reserve: ~42 hours. 21 Jewels. Features a quick-set GMT and hacking seconds.
Dimensions
Case Diameter: 42mm | Thickness: 12.5mm | Lug-to-Lug: 52mm | Lug Width: 21mm. Wears slightly larger due to the prominent triple crowns.
Description
An over-engineered tool watch that blends a classic field dial with naval GMT functionality. The watch is defined by its industrial aesthetic and 'triple crown' architecture, allowing the wearer to track three time zones simultaneously. It captures a rugged, utilitarian spirit that bridges the gap between sea and sky.
Key Features
Triple-crown configuration; internal city disc displaying locations like 'Lanai' or 'Azores'; internal rotating GMT bezel; high-beat Swiss automatic movement.
Dial Description
Matte black dial with 12/24-hour Arabic numeral indices. Sword-style luminous hands. A curved aperture at 9 o'clock displays various world locations (e.g., 'LANAI HAWAII'). T-shaped GMT hand indicates second time zone.
Case Material
316L Stainless Steel with a predominantly brushed finish and polished accents on the bezel outer ring.
Crystal Type
Slightly domed Sapphire crystal. No visible Cyclops; internal AR coating (age/wear visible in photo).
Bezel Details
Dual bezel system: An external unidirectional 60-minute countdown bezel and an internal rotating T2/city bezel controlled by the 9 o'clock crown.
Crown & Pushers
Three screw-down crowns: 2 o'clock for time/date, 4 o'clock for internal rotating GMT ring, and 9 o'clock for the city selector disc.
Bracelet or Strap
Integrated black rubber strap with white contrast stitching and a signature Hamilton 'H' shaped tang buckle.
Caseback Details
Solid screw-down stainless steel caseback, usually featuring a conversion scale for Feet/Meters and Celsius/Fahrenheit.
Movement Type
Automatic, Caliber ETA 2893-2. Frequency: 28,800 bph. Power Reserve: ~42 hours. 21 Jewels. Features a quick-set GMT and hacking seconds.
Water Resistance
200 Meters (660 Feet). Suitable for swimming and recreational diving. Requires secure crown seals due to the triple-entry point risk.
Origin & Provenance
Swiss Made. Movement by ETA (Grenchen). Brand originally American (Lancaster, PA) but moved operations to Switzerland in the 1960s.
Age Estimate
Circa 2005-2015 production. Reference H77615 is a foundational model of the modern Khaki Navy collection.
Cultural Significance
Represents the modern evolution of the military Hamiltons of WWII. It is widely considered one of the best value-for-money Swiss GMTs in the horological community.
Condition Notes
Good / Daily Wearer. Visible surface scratches on the external bezel and case. Lume on the hands appears intact. The crystal shows some smudging or possible coating wear.
Value Estimate
Pre-owned market: $450 - $650 USD depending on condition and presence of box/papers. Retail (discontinued) was approximately $945.
Care & Maintenance
Service every 5-7 years for the ETA movement. Pressure test annually if used for swimming. Ensure all three crowns are fully screwed down before water exposure.
Similar Watches
Hamilton Khaki Navy Air Race (Orange accents); Longines Spirit Zulu Time (Higher tier); Seiko 5 GMT SSK001 (Entry level alternative).
Interesting Facts
The Khaki Navy GMT series gained significant pop-culture recognition after a variant of this design was worn by John Krasinski in the 'Jack Ryan' series and appeared in the film 'Interstellar'.