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The Sternglas Naos Automatik is a family of watches, not one fixed specification. The current piano-black model has a Miyota 8215 movement and up to 42 hours of power reserve; the Naos Automatik Edition 60 uses a Miyota 8315 and is listed with a 60-hour reserve. Comfort reports are positive but apply to particular editions and straps, so check the exact reference before comparing specifications or choosing a version.
Which Naos Automatik does this review describe?
The specifications below distinguish two current Sternglas listings from older independent hands-on reviews. They should not be combined into a single family-wide spec sheet: the movement, reserve, dial, strap and some dimensions vary by reference.
| Detail | Naos Automatik, piano black | Naos Automatik Edition 60 |
|---|---|---|
| Reference | S02-NA53-PR07, according to Sternglas’s piano-black listing | Edition 60, according to Sternglas’s Edition 60 listing |
| Case diameter | 38 mm | 38 mm |
| Case height | 12 mm without crystal | 12 mm; the listing does not specify whether this measurement includes the crystal |
| Lug-to-lug | 42 mm | 43 mm |
| Movement and reserve | Miyota 8215 automatic; up to 42 hours | Miyota 8315; 60 hours |
| Dial and date | Piano-black dial; date | Date at 6 |
| Strap | Black leather | Not stated on the product listing cited here |
| Price shown | Not stated on the product listing cited here | €499 including VAT on the page captured 7 October 2026; price and availability can change |
Sternglas’s 2019 product review concerns an earlier white-dial watch with a Miyota 821A and Milanese bracelet, not either movement configuration above. A separate 2023 Fratello review covers the Yellow Edition. Those reports offer useful wear impressions, but they are not inspections of the current piano-black reference.
How does the Naos Automatik wear?
Independent reviewers found their 38 mm watches comfortable, while noting different details about fit and profile. In its 2019 review, Fratello called the earlier Naos “a very comfortable watch to wear with its 38mm case and the Milanese strap.” That reviewer also preferred a leather strap because of concerns with the tested bracelet’s straightness, clasp adjustment and clasp security. Those criticisms apply to that reviewed Milanese bracelet; they do not establish a problem with the current piano-black leather strap.
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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.)
For the Yellow Edition in 2023, a Fratello reviewer reported comfortable wear on a 7-inch wrist despite the watch’s 12 mm profile. The profile initially appeared substantial from the side; the reviewer later wrote that “the thickness is no longer on my mind.” This is one wearer’s impression of that edition, rather than a guarantee of fit for every wrist or strap.
What movement is in the Sternglas Naos Automatik?
It depends on the reference. Sternglas lists a Miyota 8215 in the current piano-black model, with up to 42 hours of reserve, date, hacking seconds and manual winding. The listing gives a stated accuracy of -20/+40 seconds per day; this is the manufacturer’s specification, not a controlled measurement of a particular watch.
Rank #2
- The "Tsuyosa" Automatic, from the NJ015 series, brings ultramodern sports styling right to your wrist. Executed in a versatile 40mm footprint, the sophisticated design of the watch makes a strong impression via a silver-tone stainless steel case and a seamlessly integrated, matching bracelet.
- . Underneath an anti-reflective sapphire crystal, the sporty timepiece makes use of a sunray green dial, with a 3 o’clock date window and contrasting silver-tone details adding to its classic aesthetic. Powered by an automatic movement and offering up to 50 meters of water resistance, the refined timepiece is a daily wearing choice ready for work, play, and everything in between. Caliber 8210.
- 3 Hand with Date, Automatic, 42 Hour Power Reserve
- Sapphire Crystal
- 50M Water Resistant and 5 Year Limited Warranty
The Edition 60 listing specifies a Miyota 8315 and 60 hours of power reserve, along with date at 6, hacking seconds and manual winding. The 8315 and 8215 listings therefore should not be treated as interchangeable descriptions of the Naos. The movement maker’s movement catalog provides general movement information, but the Sternglas listing is the relevant source for identifying what is specified in each watch.
Independent reader supportYour contribution helps us test, update, and keep practical guides available for everyone.What are the case, crystal and water-resistance specifications?
Both current listings describe a polished 316L stainless-steel case, 38 mm in diameter, with a double-domed sapphire crystal and water resistance up to 5 ATM. The piano-black listing specifies anti-reflective coating; Edition 60 specifies double anti-reflective coating. Sternglas lists the piano-black case at 12 mm high without the crystal, with a 42 mm lug-to-lug measurement and 20 mm lugs. Edition 60 is listed with 12 mm height, 43 mm lug-to-lug and 20 mm lugs.
Rank #3
- ⌚【Design Inspiration】This is an all-steel octagonal design with the characteristics of a classic sports adventure watch. The shape is exquisite and exquisite. Through amazing proportions, high-tech materials, and anti-magnetic structure,You can see the precise operation of each mechanical part, its unique masculine beauty injects new blood into the sports watch.
- ⌚【Unique Octagonal Design】The front of the octagonal bezel is polished with a polished and brushed process, which is resistant to scratches and presents two different metallic textures. The most classic and legendary aesthetic design has finally conquered the world as the ultimate octagonal case of sporty elegance. The 1.61inch large dial with high quality stainless steel watch band makes the watch more durable. The total length of the watch is 8.26inch.
- ⌚【Mechanical Movement】NO need to use BATTERY, but AUTOMATICE SELF-WINDING! The back of the watch adopts a back-through design, through the sapphire glass back we can clearly observe the movement beauty of the movement.The watch is equipped with a stainless steel bracelet that is comfortable to wear and has a very elegant posture. The whole is meticulously polished to bring a more refined wearing experience.
- ⌚【30M Waterproof】Daily life waterproof design which bear daily wash hand, swear,accidental rain or water splash.Please keep it away from swimming and hot water bathing in case consume the watch.(Note! Mechanical watch is different from quartz watch. Insufficient mechanical kinetic energy will cause the watch to stop, please winding it in time.)
- ⌚【Perfect Gifts】With a independently designed FORSINING watch box, is the perfect gift for yourselves or for that special and important someone. The fashion design watch can be easily matched with a variety of clothing and suitable for all occasions.
The one-millimetre lug-to-lug difference is reference-specific. It is also worth comparing listings directly if case length is decisive, rather than assuming that every Naos shares one measurement. The manufacturer’s 5 ATM rating should not be read as a claim that this is a dive watch.
Quick Recap
What should you check before choosing one?
- Match the exact reference and edition. Confirm the dial, reference number and movement on the live product page.
- Check fit using more than diameter. Compare lug-to-lug length and case height, and account for the domed crystal when considering how the watch will sit under a cuff.
- Choose by strap, not family reputation. The current piano-black listing includes black leather; older reviews discuss a Milanese bracelet, while the Yellow Edition review discusses a Cordura strap. Check what is supplied with the specific variant and verify lug width and attachment compatibility before buying a replacement.
- Inspect dial and low-light details. Sternglas lists no lume on the piano-black reference. The cited listings do not establish the same lume specification for every edition.
- Verify current price and availability. Edition 60 was shown at €499 including VAT on the page captured 7 October 2026; that figure is not a guarantee of today’s price or stock in every market.
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.
