Lum-Tec M90 Automatic Watch
Lum-Tec Solar Marine 4 Watch
Size Guide
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The Lum-Tec Solar Marine 4 is a sleek, compact powerhouse built to thrive in the harshest conditions and keep ticking long after others fade. Designed, hand-assembled, and fully tested in Ohio, this 39mm tool watch is crafted from forged 316L surgical-grade stainless steel, finished with a rugged bead-blasted texture and coated in military-grade titanium carbide gunmetal PVD. It’s lean at just 10.7mm thick, but loaded with serious dive specs—300 meters water resistance, a rotating bezel with luminous PIP, and a 2mm thick sapphire crystal with double-sided anti-reflective coating for clarity in any conditions.
What sets the Solar Marine 4 apart is its solar-powered VS42A movement—just one minute of sunlight delivers a full day of power, with up to six months of reserve on a full charge. The translucent black solar dial, matched with X1-grade C3 Super-Luminova and Lum-Tec’s proprietary MDV luminous technology, delivers legibility that lasts through the darkest nights. With a tough nylon strap, premium hardware, and a production run limited to just 500 pieces worldwide, this is a mission-ready machine for adventurers who expect the best—and don’t have time to change batteries.
- 39mm Forged 316L Surgical grade stainless steel case
- Bead blast finish for extra durability
- Military grade Titanium Carbide gunmetal PVD hard coating
- Rotating bezel and steel insert with luminous PIP
- 39mm case width
- 20mm lug width
- 43.5mm lug to lug length with curved lug profile
- 10.7mm thickness including sapphire
- 300 meters water resistance
- Solar powered VS42A movement from Japan
- Just 1 minute of sunlight produces a full day of power
- 6 months power reserve on full charge (5 hours sunlight)
- Anti-shock movement mounting system
- 2mm thick sapphire with double side military grade AR coating
- Threaded solid 316L stainless steel caseback
- Threaded crown with double Viton® seals.
- High tech Viton® case gaskets
- Nylon military style strap with matched bead blasted gunmetal PVD hardware
- Drilled lugs for easy strap changes
- Translucent black solar dial
- X1 grade Super-Luminova C3 green glow
- Premium, diamond-cut hands with X1 grade Super-Luminova
- MDV Luminous Technology on dial and hands
- Lifetime free battery changes, seal cleaning and pressure testing
- Limited and numbered series of 500 worldwide
- 2-year limited warranty
- Designed, assembled by hand and fully tested in Ohio
Returns Policy
You may return most new, unopened items within 30 days of delivery for a full refund. We'll also pay the return shipping costs if the return is a result of our error (you received an incorrect or defective item, etc.).
You should expect to receive your refund within four weeks of giving your package to the return shipper, however, in many cases you will receive a refund more quickly. This time period includes the transit time for us to receive your return from the shipper (5 to 10 business days), the time it takes us to process your return once we receive it (3 to 5 business days), and the time it takes your bank to process our refund request (5 to 10 business days).
If you need to return an item, simply login to your account, view the order using the "Complete Orders" link under the My Account menu and click the Return Item(s) button. We'll notify you via e-mail of your refund once we've received and processed the returned item.
Shipping
We can ship to virtually any address in the world. Note that there are restrictions on some products, and some products cannot be shipped to international destinations.
When you place an order, we will estimate shipping and delivery dates for you based on the availability of your items and the shipping options you choose. Depending on the shipping provider you choose, shipping date estimates may appear on the shipping quotes page.
Please also note that the shipping rates for many items we sell are weight-based. The weight of any such item can be found on its detail page. To reflect the policies of the shipping companies we use, all weights will be rounded up to the next full pound.
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