Lüm-Tec Combat B Chrono or M-Series Chronograph
Chronograph / Tool Watch · Lüm-Tec (Wohlwatch LLC), an independent American watch brand known for extreme luminosity and rugged tool watches, positioned in the independent microbrand luxury tier
Period: Modern Luxury Tool Watch (2000s-present)
Type
Chronograph / Tool Watch
Brand
Lüm-Tec (Wohlwatch LLC), an independent American watch brand known for extreme luminosity and rugged tool watches, positioned in the independent microbrand luxury tier
Movement
Meca-quartz chronograph movement (likely Seiko/TMI VK series), combining mechanical chronograph feel with quartz accuracy
Dimensions
Case diameter approximately 44mm, thickness 14mm, lug-to-lug 52mm, lug width 24mm
Description
This Lüm-Tec chronograph makes a bold statement on the wrist with its robust cushion-style case and highly legible tactical dial layout. Designed as a pure modern tool watch, it incorporates Lüm-Tec's proprietary maximum darkness visibility (MDV) luminous technology. The combination of a substantial steel case, a high-contrast black dial with oversized numerals, and a sporty black rubber strap with red stitching gives it an unmistakable utilitarian aesthetic built for durability and everyday wear.
Key Features
Oversized cushion case profile, proprietary MDV luminous technology, highly legible military-inspired dial layout, meca-quartz chronograph functionality offering sweeping chronograph seconds with quartz precision
Dial Description
Black dial featuring large printed Arabic numerals at 12 and 6, heavy luminescent bar indices, sword-style hands, subdials for chronograph minutes and a 24-hour indicator, along with a date window positioned between 4 and 5 o'clock
Case Material
Stainless steel (316L) with a combination of brushed and polished finishes
Crystal Type
Sapphire crystal with anti-reflective coating showing minor surface smudges
Bezel Details
Fixed smooth rounded steel bezel with a brushed top surface
Crown & Pushers
Large signed screw-down crown with protective guards and pump-style chronograph pushers on the right flank
Bracelet or Strap
Black rubber strap with contrast red stitching and dual metallic riveted accents near the lugs
Caseback Details
Solid stainless steel screw-down caseback with manufacturer engravings and serial information
Movement Type
Meca-quartz chronograph movement (likely Seiko/TMI VK series), combining mechanical chronograph feel with quartz accuracy
Water Resistance
Rated to 100 meters (10 ATM / 330 feet), suitable for swimming, snorkeling, and recreational water sports, but not professional saturation diving
Origin & Provenance
Assembled in the USA using Swiss or Japanese components and movements
Age Estimate
Likely produced in the 2010s based on the design language and movement configuration
Cultural Significance
Represents the rise and success of independent American microbrands in the 21st century, proving that robust, high-performance tool watches can be successfully designed and marketed outside of traditional Swiss conglomerates
Condition Notes
Very Good condition overall. The case shows minor surface scratches and hairline scuffs consistent with light to moderate wear, particularly on the bezel area. The crystal remains clean, and the rubber strap is pliable with strong stitching intact
Value Estimate
Estimated secondary market value ranges from $300 to $700 USD depending on the inclusion of the original box, papers, and overall condition
Care & Maintenance
Standard quartz and meca-quartz care applies. Recommend replacing the battery every 2 to 3 years, pressure testing water resistance annually if exposed to moisture, and cleaning the rubber strap with mild soap and warm water
Similar Watches
Hamilton Khaki Field Chrono, Sinn 356 Flieger, and various tactical offerings from Reactor or Luminox, though distinguished by Lüm-Tec's unique cushion case geometry and superior lume application
Interesting Facts
Lüm-Tec is celebrated in the watch collector community for applying some of the brightest and most enduring luminous compounds available on the market, often utilizing eight or more layers of their proprietary MDV technology