Bersigar Luxaura 1639 — Silver Black Edition
The watch
The Bersigar Luxaura 1639 Silver Black is a 42mm dive watch with an obsidian black dial, powered by a Seiko NH35A automatic movement. It brings a unidirectional rotating sapphire bezel, 100m water resistance and a sapphire crystal. It belongs to Hour IV, Dive, in our Expedition season: a natural choice for travel days near the water.
BERSIGAR Luxaura 1639: Silver Black Edition
The BERSIGAR Luxaura 1639 Silver Black embodies the classic diver watch aesthetic with an enduring monochrome profile. Defined by a high-gloss black unidirectional rotating sapphire bezel, an obsidian black dial, and a solid 316L stainless steel build, this 42mm timepiece delivers unmatched versatility and rugged refinement suited for deep-water diving, boardroom meetings, and daily wear.
Powered by the Seiko Japanese TMI NH35A automatic movement, the caliber winds continuously through natural wrist motion without the need for batteries. The dial features high-contrast luminescent geometric hour markers, polished Mercedes-style hands, and a date display at 3 o'clock magnified by an external cyclops lens for instant legibility. Machined from solid 316L polished and brushed stainless steel, the watch is fitted with a matching three-link Oyster-style bracelet, a scratch-resistant sapphire crystal, and a threaded screw-down crown providing 10 BAR (100M) pressure resistance.
Key Highlights
Seiko Japanese TMI NH35A Automatic Caliber: Workhorse Japanese self-winding mechanical movement offering dependable precision, hacking seconds, and battery-free reliability.
Classic Black Dial: High-contrast obsidian black face accented by applied luminescent indices and classic Mercedes hands for superior low-light visibility.
Sapphire Unidirectional Bezel: Premium black sapphire bezel insert with crisp timing demarcations and a coin-edge rim for tactile, non-slip operation.
Solid 316L Stainless Steel Bracelet: Three-link Oyster-style steel bracelet offering balanced wrist weight, ergonomic articulation, and high durability.
Sapphire Crystal: Ultra-hard sapphire glass ensuring long-lasting optical clarity and surface protection.
10 BAR (100M) Water Resistance: Reinforced with a threaded screw-down crown, protective crown guards, and a sealed caseback built for daily resilience and pressurized water exposure.
Technical Specifications
| Specification | Detail |
| Brand | BERSIGAR |
| Model | Luxaura 1639 (Silver / Black Dial) |
| Movement | Seiko Japanese TMI NH35A Automatic (Self-Winding Mechanical) |
| Case Dimensions | 42mm Diameter × 13mm Thickness |
| Lug-to-Lug | 51mm |
| Lug Width | 20mm |
| Case & Strap Material | Solid 316L Polished & Brushed Stainless Steel |
| Bracelet Style | Three-Link Oyster Style |
| Bezel Style | Unidirectional Rotating Sapphire Bezel (Black) |
| Dial Color | Obsidian Black |
| Glass | Sapphire Crystal |
| Crown | Threaded Screw-Down Crown with Crown Guards |
| Clasp | Comfort Folding Mechanism with Safety Deployment |
| Weight | 170g |
| Water Resistance | 10 BAR / 100 Meters |
Good to know
It runs on a Seiko NH35A automatic movement. It winds itself from the motion of your wrist, so there is no battery to replace.
Yes for swimming. It is rated to 100m (10 ATM), which covers rain, hand-washing and pool or sea swimming. It is not intended for scuba diving, and avoid hot showers and saunas.
The case measures 42mm — a mid-to-large size that suits average and larger wrists (roughly 16.5 cm / 6.5 in and up). Our watch size guide (/pages/watch-size-guide) explains how to measure your wrist.
It has a obsidian black dial, framed by a unidirectional rotating sapphire bezel, under an anti-reflective sapphire crystal.
Yes. Other versions we carry include the Bersigar Luxaura 1639 Silver Green, the Bersigar Luxaura 1639 Two-Tone Blue Dial, the Bersigar Luxaura 1639 Two-Tone Black Dial. Availability changes with stock, so the collection page always shows what is in stock today.
On the ChronoSeasons dial it sits at Hour IV — Dive, part of the Expedition season, and suits swimming, sailing, beach travel and everyday wear.
Yes. It ships brand-new and boxed from the brand's verified channel. Unworn watches can be returned within 30 days of delivery.
From the journal
Owners say
Took this out kayaking around Tybee Island last weekend. The 100m rating, screw-down crown, and bright geometric lume markers performed great on the water. The unidirectional bezel action was a little stiff out of the box before working it around a few times.
Bought this for my husband's 50th birthday. He is picky about dive watches and immediately noticed the sapphire bezel and solid steel bracelet. He hasn't put his other watches on since.
Wears nicely under a dress shirt at my dental practice and looks classic with a suit jacket. The shipping carrier delayed the box by two days, though the watch itself arrived in great condition.
Sorry for the two-day carrier delay getting to Dayton, Stephen, and thank you for your patience! We're glad the watch arrived safely and works well at your practice.
Between shifts at the firehouse and weekend drives up the canyons outside Salt Lake, I wanted a tough mechanical watch with high-contrast markers. The geometric indices against the black dial are super clear. The outer presentation box was fairly basic, though the watch is where the money went.
Obsidian black dial and sapphire bezel look super clean. Fits my wrist comfortably.
Keeps good time on my wrist. Rotor has a faint whir in a silent room.
Appreciate the review, Billy! The Seiko NH35A bidirectional winding rotor can make a soft mechanical sound in a quiet room, which is normal for an automatic caliber. Glad it's keeping solid time for you!
Great sapphire bezel and lume. Clasp lacks half-links so it runs slightly snug in summer.
Thanks for the feedback, Eric! Glad you're enjoying the sapphire bezel and lume on your 1639.
Picked up the Silver Black Luxaura 1639 for my brother's 40th birthday. He wanted a classic black automatic dive watch he could wear every day, and he was blown away by the sapphire bezel insert.
Happy 40th to your brother, Terry! That sapphire bezel insert over the obsidian black dial really gives it a clean, scratch-resistant finish for daily wear.
Solid 42mm NH35A diver. Fits my 6.75-inch wrist well on trips out of Provo.
