Lüm-Tec · Microbrand · United States

Lüm-Tec Combat B74 GMT

Ref. LTB74gmt · Limited · 2026 · limited to 500 · Field, GMT

Lüm-Tec Combat B74 GMT on a desert tan nylon strap
Photo: Lüm-Tec
  • Lüm-Tec Combat B74 GMT, dial with 24-hour GMT ring
  • Lüm-Tec Combat B74 GMT lume shot
  • Lüm-Tec Combat B74 GMT on a black nylon strap
From $1,095
  • Miyota 9075
  • 39 mm × 13.8 mm
  • Sapphire crystal
  • 200 m water resistance

Movement

Type
Automatic
Tier
Mid
Complications
Hours, Minutes, Seconds, GMT
Frequency
28,800 bph
Power reserve
42 h
Hacking
Yes
Accuracy (factory)
-10 / +30 s/day
Modifications
Anti-shock movement mounting system; timing adjusted in 6 positions after assembly (no tolerance stated)

Case

Diameter
39 mm
Lug to lug
46 mm
Thickness
13.8 mm
Lug width
20 mm
Material
Steel (316L)
Hardening
—
Water resistance
200 m
Crown
Screw-down
Case back
Display, screw-down
Bezel
Fixed
Finishing
Fine bead-blasted, with a PVD anti-fingerprint coating

Crystal & dial

Crystal
Sapphire
Shape
Domed
Anti-reflective
Inner
Lume
Super-LumiNova X1 C3 (MDV Luminous Technology; triple-layer dial, back-filled hands)

Bracelet

Bracelet
—

Straps

Strap 1
NATO, Two pass-through nylon military straps, black and desert tan, with hardened titanium carbide hardware

Weight

Head only
—
On bracelet
—
On strap
—

Prices

VariantConfigurationTypePriceUSDAs ofSource
All—Msrp1,095 USD$1,0952026-10-24link

About this entry

80% of key specs known. Missing: weight, hardening, bracelet offered.

Listed as "39mm Combat B74 GMT"; the B74 comes only in 39mm, a smaller version of the 43mm Combat B case. Limited and numbered series of 500. Brand specs: 39mm, 13.8mm "case thickness" (the brand doesn't say whether the domed sapphire is included; the 43mm Combat B pages quote their 13.6mm including it), 46mm lug- to-lug (the brand says it wears like a 41-42mm one), 20mm lugs, 200 m, exhibition caseback with a sapphire window, inner DLC anti-reflective coating on a slightly domed, Hytrel-mounted sapphire. Miyota 9075 true GMT with a jumping local hour hand; triple-layer matte black and charcoal dial with a 24-hour scale for the GMT hand. No date window is visible in any of the brand's photos, so the date is recorded as absent. The spec list mentions no PVD colour coating, though the case looks dark grey in the photos. MDV Luminous Technology, per the brand: the dial is printed with over 30 layers of Super-LumiNova over a chemically coated reflective base so the glow is directed out of the front rather than lost into the dial, and RC Tritec in Switzerland tested and verified its dials as top performers. Brand case claims: forged 316L (forging said to raise fatigue strength 37% over a cast case), heat treatment "to increase metal hardness" (not recorded as hardening: no surface treatment or hardness is given), bead-blast finish said to improve scratch resistance by 8-10%, PVD anti-fingerprint coating, double Viton gaskets in the threaded crown and caseback, tested to 30% beyond the 200 m rating. The lugs curve down steeply; the brand says the 46mm lug-to-lug wears like a 41-42mm one. Fixed knurled (coin-edge) bezel and no crown guards, from the brand's photos. The included straps are pass-through nylon military straps that loop through both spring bars. No bracelet comes with the watch. Weight is not published. Listing created May 2026.

Last verified: 2026-10-25. Edit or correct this entry.

Sources