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The Sternglas Marus 2.0 is an automatic watch with diver-inspired styling, not a certified dive watch: Sternglas says it has not been certified to ISO dive-watch standards. The black version is listed with a 42 mm steel case and TMI NH35 movement. Its 20-bar rating describes laboratory test pressure, not a promised diving depth.
What the Marus 2.0 is
Sternglas describes the Marus 2.0 as a complete redesign of the original Marus, with broader hour markers, revised bezel details and an automatic movement. The maker frames it as a dive-inspired design within its Bauhaus-style range. That makes it a sport watch with a diver-style look, rather than a conventional minimalist dress watch. These are the manufacturer’s descriptions, not independent observations.
Sternglas founder Dustin Fontaine describes the brand’s positioning this way: “Since 2016, we have been breaking new ground and developing timeless Bauhaus-style watches that will outlive trends and continue to give pleasure for many years to come.” This is the founder’s statement of intent, not evidence of long-term durability.
Black Marus 2.0 specifications
The official black product page lists these specifications. They are manufacturer-published figures, not independent measurements.
#1 Best Overall
- Stainless Steel case with Black Resin Band
- Black Dial with date window at 3 O'clock
- Luminous markers and hour hands; sweep second hand
- Anti-reverse bezel
- Water-resistant to 200 M (660 feet)
| Specification | Black Marus 2.0 |
|---|---|
| Case diameter | 42 mm |
| Case height | 12 mm, excluding the crystal |
| Lug-to-lug | 50 mm |
| Lug width | 20 mm |
| Case material | 316L stainless steel |
| Crystal | Sapphire with double anti-reflective coating |
| Movement | TMI NH35 automatic |
| Published accuracy | -20/+40 seconds per day, as listed by Sternglas |
| Power reserve | Up to 41 hours, as listed by Sternglas |
| Other listed functions | Date and hacking seconds |
| Water resistance | 20 bar / 20 ATM, according to Sternglas |
These dimensions offer a useful first screen for fit: the 50 mm lug-to-lug measurement is especially relevant to how far the case may span across a wrist. The figures alone cannot establish how the watch will feel or sit on an individual wrist.
Is the Marus 2.0 a certified dive watch?
No. Sternglas says the Marus 2.0 has not been certified under ISO dive-watch standards. The company describes it as an automatic watch with dive-inspired design. Its discussion of ISO 6425 and DIN 8306 refers to standards that include technical requirements such as legibility and resistance to environmental conditions; that does not establish that this model has passed those standards.
Rank #2
- WATER-RESISTANT: these water-resistant men's dive watches are ISO scuba-approved to depths of 200 meters
- AUTOMATIC: these self-winding, automatic men's watches are powered by your movement, with a power reserve of 41 hours
- STAINLESS STEEL: features a durable 43.8mm stainless steel watch case and bracelet.
- LUMIBRITE DISPLAY: this men's automatic watch features a highly-legible display with LumiBrite hands and markers
- 4R35 CALIBER: equipped with the reliable caliber 4R35 automatic movement, this accurate men's watch keeps precise time
The watch has features associated with diver-style designs. Sternglas describes its bezel as unidirectional, with a 60-minute scale and 120 clicks, and says the bezel markings, hands and broader hour markers use luminous material. These are manufacturer claims; no independent assessment of bezel operation or low-light performance is established here.
What does 20 bar water resistance mean?
Sternglas rates the Marus 2.0 to 20 bar, or 20 ATM. The company says this figure describes test pressure under laboratory conditions and does not refer to a real diving depth. In particular, a dial or specification expressed as “200 metres” should not be read as permission to dive to that depth.
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- Stainless steel case 40mm diameter x 14.1mm thick; Exhibition case back; Black dial; Luminous hands.Band Length: 205mm
- NH35A Japanese Automatic movement, 24 jewel; Assembled in Malaysia; Watch weight 155 grams
- Includes gift box, instructions and 3 year limited manufacturer warranty; Invicta Customer Service can be reached at 1-800-327-7682 for questions (re: Additional links, band replacement, band adjustment, warranty questions, etc.)
Sternglas presents the watch as suitable for everyday use around water, but says it is not intended for professional diving. Follow the manufacturer’s guidance rather than treating the pressure rating as a dive-use guarantee.
Variants, price and availability
Sternglas lists a black version and a green-dial version with a bronze-finish case and bracelet. Confirm the available variants and local stock in your market before ordering. The official black product page lists €549; this is a changeable listed price, not a guaranteed price for every market or date.
Rank #4
- Iconic Promaster watches with advanced functions designed to venture to the deepest depths.
- 3 Hand, Date
- Silver-Tone Stainless Steel
- Luminous Hands and Markers and Mineral Crystal
- Sustainably powered by any light, with our Eco-Drive technology this watch never needs a battery. ISO Certified, 200M Water Resistant and 5 Year Limited Warranty
Bracelet fit and maintenance
The black product page describes tool-free quick-change spring bars. A 20 mm lug width does not by itself guarantee that a generic strap or bracelet will fit correctly: end-link shape and clearance also matter.
Sternglas’s German accessory page lists a 20 mm stainless-steel bracelet for the Marus 2.0 and Merion only. It specifies 316L steel and a bracelet length of 130–180 mm, and lists the bracelet at €89. Check local availability and current pricing, and follow the stated model compatibility rather than assuming other 20 mm bracelets will fit.
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Best Value
- Stainless steel case 43mm diameter x 12mm thick; Black dial; Luminous hands and hour markers
- Japanese quartz movement, PC32 Caliber; Assembled in Japan; SR626SW battery included; Watch weight: 170 grams
- Stainless steel band, 185mm L x 22mm W; Band is adjustable by adding/removing links; Fold over safety clasp
- Flame Fusion crystal; Screw down crown; Uni-directional stainless steel bezel with black top bezel ring; 100 meter water resistant: Suitable for recreational surfing, swimming, snorkeling, sailing and water sports. Not suitable for diving
For care, Sternglas recommends service every 3–5 years for daily use. It also advises having the seals checked every five years and replaced if needed. These are the manufacturer’s recommendations, not a universal service interval for every automatic watch.
What is—and is not—established about wearing it
The published specifications explain the movement, dimensions and water-resistance claim, but they do not establish wrist comfort, finishing quality, timekeeping in use, lume duration or how the bezel feels in operation. No independent hands-on assessment is available to support those judgments, so treat them as questions to check in person or through a separately documented review rather than as proven strengths or weaknesses.
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Product prices and availability are accurate as of the date/time indicated and are subject to change. Any price and availability information displayed on Amazon at the time of purchase will apply.
