Marathon 41mm SSNAV-D AUTO Type II - Pilot's Automatic
Marathon 41mm SSNAV-D AUTO Type II - Pilot's Automatic
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Marathon 41mm SSNAV-D AUTO Type II - Pilot Automatic Watch: Military Durability with Automatic Winding
Marathon 41mm SSNAV-D AUTO Type II (Steel Navigator w/ Date Automatic) is the first in the Steel Navigator series, originally launched in 1986, to feature an automatic mechanical movement. This pilot's watch is powered by the Sellita SW200-1 movement with an Incabloc® shock protection system, delivering precise and reliable timekeeping performance. The durable 316L stainless steel case, treated with Parkerized finishing, is paired with a screw-down crown and a sapphire crystal, achieving a water resistance rating of 10 ATM (100m/300ft). The raised 12-hour bidirectional rotating GMT bezel enables quick dual-time tracking, complemented by a robust Ballistic Nylon Strap for comfort and stability during flights, parachuting, or daily adventures.
Military-Grade Specifications & Superior Precision
- Powered by the Sellita SW200-1 automatic movement, featuring Incabloc® shock protection and 26 jewels for high stability and long-term durability.
- 316L stainless steel case with Parkerized coating for corrosion resistance and a rugged military aesthetic.
- Dial and hands illuminated with Tritium gas tubes, providing clear nighttime readability without external light sources.
- 12-hour bidirectional rotating GMT bezel with raised markers for easy operation, even with gloves.
- Screw-down crown and reinforced waterproof construction support 10 ATM (100m/300ft) water resistance, suitable for extreme mission environments.
Comfortable & Durable Strap Configuration
- Equipped with a 20mm Ballistic Nylon Strap that offers high tensile strength and excellent wear resistance, ensuring breathability and comfort during prolonged wear.
- Metal buckle options include stainless steel or Parkerized finish for enhanced durability and refined aesthetics.
- Features enlarged drilled lugs for quick strap changes, catering to different environments and personal style preferences.
Heritage of Excellence: Steel Navigator’s New Automatic Evolution
Since its debut in 1986, the Steel Navigator series has been trusted by pilots and military units worldwide. The SSNAV-D AUTO retains its iconic asymmetrical case design while introducing an automatic movement with enhanced shock protection. It features a date window positioned at 4:30. This design offers exceptional stability and long-lasting durability for pilots, parachute instructors, and adventurers both in the air and on the ground.
Marathon: A Pioneer in Military Timekeeping
Founded in 1939, the Marathon Watch Company has specialized in crafting high-quality military watches, widely adopted by NATO, the U.S. military, and various law enforcement agencies. The SSNAV-D AUTO is designed in Canada and Swiss-made, combining rigorous military standards with advanced watchmaking craftsmanship to showcase Marathon’s deep expertise in aviation timekeeping.
Technical Specifications
NSN | 6645-01-698-4275 |
Movement | Sellita SW200-1 with Incabloc® Shock Protection |
Jewels | 26 |
Power Reserve | Approximately 41 Hours |
Calendar Type | Date (at 4:30 position) |
Illumination | Tritium Gas Tubes |
Case Material | 316L Stainless Steel (Parkerized Finish) |
Water Resistance | 10 ATM (100m/300ft) |
Crystal Material | Sapphire |
Crown Type | Screw-down Crown |
Bezel Type | Bidirectional Rotating (12-hour Scale) |
Case Diameter | 41mm |
Case Thickness | 11.5mm |
Lug-to-Lug | 48mm |
Lug Width | 20mm |






