Sinn’s blue-dial T1 B (EZM 14) and T2 B (EZM 15) are high-strength titanium diving watches with one clear specification difference: Sinn rates the T1 B to 1,000 m (100 bar) and the T2 B to 2,000 m (200 bar). The manufacturer also says DNV GL certified those pressure-resistance ratings. Both share a set of legibility and construction features, while the available T2 technical sheet adds several model-specific details.
How the T1 B and T2 B differ
The defining distinction in Sinn’s official brochure is pressure resistance. Sinn lists the T1 B as resistant to 100 bar (1,000 m) and the T2 B as resistant to 200 bar (2,000 m), and says DNV GL certified the respective ratings. These are manufacturer-stated specifications, not dive-planning limits or advice about how deep a watch wearer should dive. Sinn’s T1 B product information and T2 B product information identify the models; the shared brochure describes both blue variants.
| Model | Sinn designation | Stated pressure resistance |
|---|---|---|
| T1 B | EZM 14 | 100 bar (1,000 m), according to Sinn’s brochure |
| T2 B | EZM 15 | 200 bar (2,000 m), according to Sinn’s brochure |
The higher rating alone does not establish which watch is the better choice. Case fit, configuration, intended use and price may matter more, and current prices and availability are not established here.
What the blue models share
Sinn presents both as high-strength titanium divers with matt-blue electroplated dials. The brochure lists bead-blasted high-strength titanium cases and says the material’s low weight, strength, saltwater resistance and skin comfort make it suitable for saltwater use. Those are Sinn’s material claims, not independent comparative test findings.
#1 Best Overall
- Case Size: 12.20 mm, Band Width: 38.00 mm, Case Thickness: 38.00 mm
- Swiss Automatic movement, Titanium case, DATE, Grey band
- Band Type : Titanium, Band Length: 175mm
- Water-resistant Diver's watch 300m according to ISO 6425:2018
- 2 Year International Warranty
Bezel and case protection
Both use what Sinn calls a “Captive Safety Diver’s Bezel.” The brochure says its guard is intended to prevent accidental misadjustment and that the bezel receives TEGIMENT treatment for scratch resistance. Sinn also lists Ar-Dehumidifying Technology, which it says enhances functional reliability and helps prevent fogging, plus a sapphire crystal.
Legibility and operating conditions
Sinn highlights differently shaped hour and minute hands and color-differentiated luminous paint on the minute hand and bezel key mark. The contrast is intended to help the wearer read the set time in darkness or adverse viewing conditions. The brochure gives an operating temperature range of −45°C to +80°C for the watches.
Rank #2
- Hangzhou 2565 Automatic Movement：Powered by reliable Hangzhou 2565 automatic movement with up to 40 hours power reserve. No battery needed, accurate and durable for daily wear.
- Lightweight Titanium Case: Full titanium case and case back reduce weight for all-day comfort. Ceramic rotating bezel with 60-minute scale for timing and diving use.
- 200M Water Resistant：Professional dive watches for men with 200M / 20 ATM water resistance, screw-down crown and screw-back case for underwater performance.
- Sapphire Crystal & BGW-9 Luminous：Scratch-resistant sapphire crystal with AR coating for clear visibility. BGW-9 blue lume ensures easy reading in low light or underwater.
- Tactical Design : 42mm case with fabric strap and titanium buckle, fixed bars for added strength. Suitable for diving and outdoor activities.
Sinn says the models were tested based on European diving-equipment standards EN 250 and EN 14143. It also says DNV GL verifies and certifies pressure resistance, temperature resistance and function based on those standards. The available material is the manufacturer’s brochure; it does not provide an underlying certificate or independent test report.
Model-specific details available for the T2 B
Sinn’s official T2 technical sheet specifies a 41 mm case, 20 mm lug width and SOP A10-2 self-winding movement. It lists a date display and hours, minutes and seconds. These are T2 sheet specifications and should not be assumed to apply to the T1 B.
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- THORN Watches for Men: From the THORN PT5000 Automatic 39 mm Titanium Watch, uni-Directional Rotating Cermaic Bezel, live and play in the diver watches feature, patterns, and innovative materials inspired by the sea
- High Quality Material: Made of high quality titanium, this watch is not only tough and resistant to oxidation, but also comes with a comfortable and breathable 316 stainless steel strap that feels easy and natural to wear. In addition, the sapphire crystal is designed not only for exceptional beauty, but also for scratch resistance and durability, making it your first choice for future wear
- Scratch-Resistant: Sapphire glass with AR-coating and luminous BGW9/C3 Green Light, hands and markers ensure clear readability, even in low-light situations
- Precision Movement: PT5000 Automatic-self-wind movement with analog display dial. PT5000 movement has a frequency of 28,800 vibrations per hour (4Hz), guarantees accurate and precise timekeeping in various conditions
- Water Resistant 200M: Classic diver case with screw-down crown. With a water resistance rating of 200 meters (20 ATM), this watch is designed to withstand the demands of recreational diving and water sports
Strap and bracelet configurations
The brochure depicts multiple strap and bracelet options with different clasp configurations, so it does not establish a single universal package for either model. Sinn’s store lists a blue silicone strap integrated in the case as compatible with the T1 model series and gives a 22 mm lug width; that listing does not establish fit for every T1 B configuration or compatibility with the T2 B. Confirm the exact watch reference and configuration before choosing a replacement strap.
Quick Recap
Best Value
- NH35A Movement: Case 42mm x 13mm thick tinanium watches for men is powered by Japan 24 jewels fully automatic NH35A Movement. Assembled in Malaysia factory, providing precise and accurate time keeping. Power reserve can last for 41 hours. Watch weight:125 grams.
- High Quality Workmanship: Scratch resistant sapphire crystal glass with anti-reflective coating on inner surface; 22mm Width titanium bracelet is adjustable by removing or adding links and fold over clasp with safety. A must have Heimdallr watch for collection.
- Titanium Material: The strength of titanium bracelet and case is noticeable compared a stainless steel watch. High compressive resistant, strong corrosion resistant, 50% lighter than steel, skin-friendly, especially suitable for sensitive skin.
- Diving Watches: Screw down lock for water tight seal and uni-directional ceramic bezel to tell you "under" time easilly. Heimdallr mechanical watch is water resistant to 200M(20ATM). Suitable for professional marine activities, swimming, water sports and daily wearing.
- Luminated Watch: Green Luminious hands and hour markers are featuring Japan Luminous C3 material, which can last for at least 5 hours in dark and is able to quickly absorb and store light energy in a bright environment.
Rank #4
- Solar powered quartz movement helps reduce frequent battery replacement.
- 300M water resistant design supports swimming, snorkeling, diving, and water sports.
- Luminous hands and markers improve readability in dark or low-light conditions.
- Durable case and mineral glass are built for outdoor and everyday wear.
- WATCH SIZE & WRIST FIT: Features a 45.8 mm (1.80 in) case diameter and a 51.4 mm (2.02 in) lug-to-lug length. The adjustable 24 mm silicone strap accommodates wrists up to 230 mm (9.1 in). Measure your wrist and check the case dimensions before ordering, especially if you have a smaller wrist.
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