ProTek PT4101SF – 4100 Series USMC Carbon Composite Aggressor All-Black Dive Watch

Built for professionals, service members, and collectors, the ProTek PT4101SF Aggressor brings USMC-inspired design to ProTek’s most aggressive dive watch platform. Combining proven performance with commemorative detailing, it delivers mission-ready capability with added significance.

Based on the rugged Aggressor platform, the PT4101SF features a 45 mm carbon composite case, 60-click unidirectional ratcheting dive bezel, and 300-meter water resistance, ensuring true dive performance in demanding environments. Each watch is individually tested in both air and water to meet ProTek’s professional standards.

This special edition is executed in a fully blacked-out configuration, with a black case, dial, and rubber strap for a low-visibility, tactical profile. Paired with USMC-specific detailing and an embossed caseback, it stands apart from standard Aggressor models as a purpose-driven, commemorative piece.

At its core is a dependable Japanese Citizen/Miyota 2035 quartz movement with a 4-year battery life, delivering reliable timekeeping with minimal maintenance. For low-light performance, the PT4101SF is equipped with Swiss self-powered ProGlo™ tritium illumination, providing continuous glow for up to 25 years without requiring any external light source.

The watch is fitted with a durable 22 mm rubber strap, secured by a reinforced steel buckle and designed for long-term wear in harsh conditions. Built for both operational use and everyday wear, the PT4101SF combines rugged functionality, stealth design, and USMC heritage.

SPECIFICATIONS:

• Protek Model #PT4101SF
• Superior Quartz Watch Movement with Tough Shock Protection, Superior Accuracy, and Extended Battery Life
  
  • Miyota 2035 3 Hand & Date Movement
  • 4-Year Battery Life
• 60-Click Unidirectional Ratcheting Elapsed Time Bezel, 5 Minute Interval Indices
• 45mm Carbon Composite Case and Bezel
• Black Dial and Black Case
• Screw-down Caseback with United States Marine Corps Logo Embossed
• Screw-down black Crown with Double O-ring Water Resistance and Rubber Grip
• Nearly Scratchproof Sapphire Crystal with Antireflective Coating
• Diver's Rubber Strap (22mm x 20mm), with steel tube for the spring pin molded into the strap for added durability and strength
• Water Resistant to 300 Meters (all watches tested to full depth rating in both air and water)
  
• ProGlo™ T100 Swiss Tritium self-powered illumination system that glows continuously for 25 years
  • Green Tritium on Hour Markers 1 thru 11
  • Green Tritium on the Hour, Minute and Second Hands plus the Elapse Time Bezel
  • Orange Tritium on the 12 o'clock Hour Marker

DIMENSIONS:

• Diameter: 45 millimeters
• Thickness: 14.5 millimeters
• Lug Width: 22 millimeters
• Weight: 82 grams