Lum-Tec Solar Marine 7 | USA Assembled Solar Dive Watch with MDV Lume

The Lum-Tec Solar Marine 7 combines a Japanese VS42A solar movement and 300-meter water resistance in a compact 39 mm stainless steel case. Its brushed and polished steel finish and semi-transparent black dial give it a clean dive-watch look. At 10.7 mm thick and 43.5 mm lug to lug, it is sized for everyday wear.

The Solar Marine 7 is finished in brushed and polished steel. Under its semi-transparent black dial is a Japanese VS42A solar movement: about a minute of sunlight provides a day of running, and roughly five hours of sun fills it for a six-month reserve. The forged, heat-treated 39 mm case is 10.7 mm thick and 43.5 mm lug to lug, with a rotating bezel carrying a steel insert and a luminous pip, a 2 mm sapphire crystal and grade A BGW9 Super-Luminova on the markers and hands as part of Lum-Tec's MDV® luminous technology. It comes on a nylon strap with matching brushed steel hardware and is limited to 300 pieces.

As an authorized Lum-Tec dealer, The CGA Company sells the Solar Marine 7 new, never pre-owned, with free USA shipping. It is a limited, numbered series of 300 worldwide.

Specifications

• Case width: 39 mm, forged and heat-treated 316L surgical-grade stainless steel
• Thickness: 10.7 mm including sapphire
• Lug to lug: 43.5 mm
• Lug width: 20 mm, drilled lugs for easy strap changes
• Finish: Brushed and polished by hand, with anti-fingerprint coating
• Bezel: Rotating, with steel insert and luminous pip
• Water resistance: 300 meters
• Movement: Japanese VS42A solar quartz
• Charging: About 1 minute of sunlight gives a full day of power; a full charge (about 5 hours of sunlight) gives a 6-month power reserve
• Shock protection: Anti-shock movement mounting system
• Crystal: 2 mm sapphire with military-grade AR coating on both sides
• Caseback: Threaded solid 316L stainless steel
• Crown: Threaded 316L steel, double Viton® seals
• Gaskets: Viton®
• Dial: Semi-transparent black solar dial, grade A BGW9 Super-Luminova with metal-framed indices
• Hands: Diamond-cut, filled with A-grade BGW9 Super-Luminova
• Lume: MDV® luminous technology on dial and hands
• Strap: Nylon military-style strap with matching brushed stainless hardware
• Warranty: 2-year limited warranty
• Edition: Limited and numbered, 300 pieces worldwide
• Assembly: Designed, assembled by hand and fully tested in Mentor, Ohio

Construction

The Solar Marine case is forged from 316L steel and heat treated. According to Lum-Tec, forging adds about 37% fatigue strength compared with a typical cast case. The case is brushed and polished by hand, then given an anti-fingerprint coating.

The thick sapphire is Hytrel mounted and AR coated on both faces. Silicone-lubricated double Viton seals protect the crown and the threaded caseback, and Lum-Tec says the sealing is tested to 30% beyond the 300 m rating.

Heat treatment keeps the steel stable while it is forged and hardens the surface after finishing. The case seals are meant to resist salt water, chemicals and extreme heat or cold as well as depth, and the anti-shock mount helps the solar movement ride out an accidental drop or a hard knock.

Strap and Fit

At 39 mm wide, 10.7 mm thick and 43.5 mm lug to lug, it is a compact, light diver that suits a wide range of wrists. The thick nylon strap passes under both spring bars for security, and the drilled lugs make swapping in another 20 mm strap simple.

Lum-Tec says its nylon straps are more durable than typical straps of this type and are designed for easy adjustment, a secure fit and minimal weight on the wrist.

MDV® Lume

The luminous markers and hands use grade A BGW9 Super-Luminova, printed in more than 30 layers over a reflective base so the light is directed forward. The bezel has its own luminous pip. Lum-Tec says RcTritec in Switzerland verified its dials as top Super-Luminova performers.

Lifetime Service

Because the movement is solar powered, there are no routine battery changes. Lum-Tec provides free seal cleaning, lubrication and pressure testing for life, in Ohio. Lum-Tec says it regularly sees its watches come back for service after 15 or more years of use, and it puts what it learns from them into new designs. Lifetime services are provided by Lum-Tec under Lum-Tec's terms, not by The CGA Company; for service, contact service@lum-tec.com.

Hand Assembled and Tested in Mentor, Ohio

Lum-Tec says its watches are designed and engineered in Ohio from the ground up, and every Solar Marine 7 is hand assembled and individually tested in Mentor, Ohio, using international and domestic components; the movement in this model is the Japanese VS42A solar quartz. Lum-Tec says that since 2007 it has produced watches for more than 100 brands around the world, the U.S. government and SWAT teams.

Frequently Asked Questions

Does it need battery changes?
No routine changes. The VS42A runs on light: about a minute of sunlight gives a day of power, and a full charge lasts around six months.

How big is it?
39 mm wide, 10.7 mm thick, 43.5 mm lug to lug, with 20 mm lugs.

How water resistant is it?
300 meters. It has a rotating bezel with a luminous pip and a threaded crown and caseback.

What lume does it use?
MDV® luminous technology with grade A BGW9 Super-Luminova on the markers and hands.

Where is the Solar Marine 7 assembled?
Lum-Tec hand assembles and tests every Solar Marine 7 in Mentor, Ohio, using international and domestic components. The movement is the Japanese VS42A solar quartz.

Comparing Solar Marine models? See how the Solar Marine 5, 6, 7 and 8 compare on size, finish, and charging.