The LÜM-TEC Combat B73 is a rugged stainless steel field watch designed for dependable everyday wear, outdoor use, and reliable performance in demanding environments.
Built around LÜM-TEC’s proven Combat B platform, the B73 combines a forged and heat-treated 316L stainless steel case with a durable bead-blasted finish, anti-shock movement mounting system, curved sapphire crystal, and 200-meter water resistance.
The dependable Swiss Ronda 515 quartz movement delivers accurate, low-maintenance timekeeping. A matte-black dial, diamond-cut hands, Grade A Swiss BGW9 Super-LumiNova, and proprietary MDV® luminous technology provide excellent contrast and nighttime visibility.
Designed, hand assembled, and fully tested in Ohio, the Combat B73 is limited to only 500 individually numbered watches worldwide.
Features
- Dependable Swiss Ronda 515 quartz movement
- Proprietary anti-shock movement mounting system
- Forged and heat-treated surgical-grade 316L stainless steel case
- Durable bead-blasted case finish
- Anti-fingerprint surface treatment
- Curved sapphire crystal with military-grade inner anti-reflective coating
- Threaded 316L stainless steel caseback
- Threaded crown with dual Viton® seals
- High-performance Viton® gaskets
- 200-meter water resistance
- Anti-reflective matte-black dial
- Premium diamond-cut hands
- MDV® luminous technology
- Grade A Swiss BGW9 Super-LumiNova on the dial and hands
- Two heavy-grade military nylon straps included
- Designed, assembled by hand, and fully tested in Ohio
- Individually numbered edition of 500 watches
- Two-year limited warranty
- Lifetime battery replacement, seal cleaning, and pressure testing
Specifications
- Model: Combat B73
- Movement: Swiss Ronda 515 quartz
- Case Material: Forged and heat-treated 316L stainless steel
- Case Finish: Bead blasted
- Case Diameter: 43mm
- Case Thickness: 13.6mm including the domed sapphire crystal
- Lug-to-Lug Length: 51.5mm
- Lug Width: 22mm
- Crystal: Curved sapphire with military-grade inner anti-reflective coating
- Caseback: Threaded 316L stainless steel
- Crown: Threaded with dual Viton® seals
- Gaskets: Viton®
- Water Resistance: 200 meters
- Dial: Matte black
- Hands: Premium diamond-cut hands with Grade A BGW9 Super-LumiNova
- Lume: MDV® technology with Grade A Swiss BGW9 Super-LumiNova
- Lume Color: Blue
- Included Straps: One black and one gray heavy-grade nylon military strap
- Strap Hardware: Black PVD
- Production: Limited and numbered series of 500 worldwide
- Warranty: Two-year limited warranty
Dependable Swiss Quartz Timekeeping
The Combat B73 is powered by the proven Swiss Ronda 515 quartz movement. Its reliable, accurate, and low-maintenance design makes the B73 an excellent choice for everyday wear, field use, travel, and situations where dependable timekeeping is essential.
LÜM-TEC’s lifetime complimentary battery-replacement program helps provide a convenient and dependable long-term ownership experience.
Engineered for Hard Use
The Combat B73 case begins as forged surgical-grade 316L stainless steel. Forging realigns the steel’s grain structure, increases fatigue strength, and eliminates the voids and porosity that can occur in cast cases. Heat treatment further stabilizes and hardens the steel before the final finish is applied.
The bead-blasted surface produces a smooth satin appearance while improving resistance to scratches and small impacts. An anti-fingerprint coating fills microscopic surface pores and helps prevent oily marks and smudges.
Exceptional Low-Light Visibility
The matte-black dial and premium diamond-cut hands are treated with LÜM-TEC’s proprietary MDV® luminous technology. Grade A Swiss BGW9 Super-LumiNova provides a crisp blue glow and excellent readability in dark and low-light conditions.
The luminous material is applied in more than 30 layers over a specially treated reflective base. This construction directs more luminous output through the front of the watch, helping maximize brightness and nighttime performance.
Protection from the Elements
The thick, gently curved sapphire crystal provides excellent scratch resistance and a wide viewing angle. A military-grade anti-reflective coating is applied to the inside of the crystal to reduce glare without exposing the coating to external wear.
Dual Viton® crown seals, a threaded crown, and a tightly secured threaded caseback help protect the movement from water, salt, chemicals, and extreme temperatures. Every watch is pressure tested before leaving LÜM-TEC’s Ohio facility.
Comfortable and Secure Fit
The downward-curving lugs allow the 43mm case to wrap naturally around the wrist. Although the measured lug-to-lug length is 51.5mm, the pronounced curvature creates a more compact effective fit and makes the watch comfortable on a wide range of wrist sizes.
Two heavy-grade military nylon straps are included—one black and one gray—with black PVD hardware. Each pass-through strap runs behind both spring bars, helping keep the watch attached if one spring bar becomes damaged.
Ohio-Assembled Quality
Every LÜM-TEC watch is designed and engineered in Ohio, individually assembled by hand, and fully tested before shipment. The movement is secured within LÜM-TEC’s proprietary anti-shock mounting system to help maintain reliability following accidental drops and hard impacts.
The Combat B73 is backed by a two-year limited warranty and LÜM-TEC’s lifetime service program, including complimentary battery replacement, seal cleaning, and pressure testing.
