Lüm-Tec · Microbrand · United States

Lüm-Tec Solar Marine 7

Ref. LTSOL-SM7 · Limited · 2026 · limited to 300 · Diver

Lüm-Tec Solar Marine 7, steel with black dial and yellow accents, on a black nylon strap
Photo: Lüm-Tec
  • Lüm-Tec Solar Marine 7, black dial with yellow index surrounds and date at 4:30
  • Lüm-Tec Solar Marine 7 lume shot
  • Lüm-Tec Solar Marine 7, side view with crown
From $545
  • Epson VS42
  • 39 mm × 10.7 mm
  • Sapphire crystal
  • 300 m water resistance

Movement

Caliber
Epson VS42
Type
Solar quartz
Tier
Entry
Complications
Date
Frequency
n/a
Power reserve
n/a
Hacking
n/a
Accuracy (factory)
-20 / +20 s/month
Modifications
Anti-shock movement mounting system

Case

Diameter
39 mm
Lug to lug
43.5 mm
Thickness
10.7 mm
Lug width
20 mm
Material
Steel (316L)
Hardening
—
Water resistance
300 m
Crown
Screw-down
Case back
Solid, screw-down
Bezel
60-minute dive, steel insert, lumed
Finishing
Brushed and polished, with a PVD anti-fingerprint coating

Crystal & dial

Crystal
Sapphire
Shape
—
Anti-reflective
Both sides
Lume
Super-LumiNova BGW9, grade A (MDV Luminous Technology)

Bracelet

Bracelet
—

Straps

Strap 1
NATO, Black pass-through nylon military strap with brushed steel hardware; drilled lugs

Weight

Head only
—
On bracelet
—
On strap
—

Prices

VariantConfigurationTypePriceUSDAs ofSource
All—Msrp545 USD$5452026-10-24link

About this entry

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

Limited and numbered series of 300. The brand says the Solar Marine series is "back by popular demand", "updated and upgraded for 2026". Steel case with brushed and polished finish, grey bezel insert, semi-transparent black solar dial with yellow index surrounds and yellow accents on the hands (from the brand's photos; the spec list just says black dial); date window at 4:30 in the brand's photos. The spec list omits the anti-fingerprint coating line, but the description says it is applied. Solar quartz: the brand names a Japanese "VS42A" (Epson VS42) and says one minute of sunlight gives a full day of power and a full charge (5 hours of sunlight) lasts 6 months. Brand specs: 39mm, 10.7mm including sapphire, 43.5mm lug-to-lug, 20mm lugs, 300 m, 2mm-thick sapphire with double-sided anti-reflective coating, threaded solid caseback, threaded crown with double Viton seals, drilled lugs, rotating bezel with a steel insert and luminous pip (the brand doesn't say whether it's unidirectional). 60-minute bezel scale and no crown guards, from the brand's photos. Grade A BGW9 Super-LumiNova on the dial and diamond-cut hands; MDV Luminous Technology, per the brand: over 30 printed layers over a chemically coated reflective base, dials tested and verified by RC Tritec in Switzerland as top performers. Brand case claims: forged 316L (forging said to raise fatigue strength 37% over a cast case), heat treatment "to harden the metal surface after finishing" (not recorded as hardening: no treatment or hardness is given), PVD anti-fingerprint coating, sealing tested to 30% beyond the 300 m rating. The included strap is a thick nylon military strap looped through both spring bars. No bracelet comes with the watch. Weight is not published. Listing created December 2025, published on the store in January 2026.

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

Sources