New Tudor Releases for Watches and Wonders 2026
Tudor was up earlier than I this morning, with a 7 am drop, but was it worth it? With 6 new models and a choice of 31 combinations, they’ve certainly been busy. But celebrating 100...
Sinn 903 St II Navigation Chronograph - Steel Bracelet - Black Dial
- Regular price
- £3,630.00
- Regular price
-
- Sale price
- £3,630.00
- Unit price
- per
Tap to zoom
()
Sinn 903 St II Navigation Chronograph - Steel Bracelet - Black Dial
Selected Colour: Black
-
Black
-
Blue
- Regular price
- £3,630.00
- Regular price
-
- Sale price
- £3,630.00
- Unit price
- per
1 in stock
Includes FREE delivery
Couldn't load pickup availability
Free UK
90 Day Returns
Carbon neutral delivery
Free delivery over £50
More Of Our Favourite Watches
- Regular price
- £1,195.00
- Regular price
-
- Sale price
- £1,195.00
- Unit price
- per
New
- Regular price
- £299.00
- Regular price
-
£449.00 - Sale price
- £299.00
- Unit price
- per
Sale
- Regular price
- £599.00
- Regular price
-
- Sale price
- £599.00
- Unit price
- per
New
- Regular price
- £399.00
- Regular price
-
- Sale price
- £399.00
- Unit price
- per
- Regular price
- £399.00
- Regular price
-
- Sale price
- £399.00
- Unit price
- per
- Regular price
- £345.00
- Regular price
-
- Sale price
- £345.00
- Unit price
- per
- Regular price
- £345.00
- Regular price
-
- Sale price
- £345.00
- Unit price
- per
- Regular price
- £299.00
- Regular price
-
- Sale price
- £299.00
- Unit price
- per
- Regular price
- £449.00
- Regular price
-
- Sale price
- £449.00
- Unit price
- per
- Regular price
- £599.00
- Regular price
-
- Sale price
- £599.00
- Unit price
- per
The 903 series is presented in a version that has been technically completely redesigned. Visually recognisable, the navigation chronograph 903 St II is available as a standard model with an electroplated black dial with sunburst decoration and has been elevated to an unparalleled technical level. The functionally designed dial imprints the navigation chronograph in our product range with decades of tradition. For example, the slide rule bezel with a logarithmic scale can be used to calculate times, distances or fuel consumption. Of particular note is the use of hybrid ceramic luminous elements in the indices, which are meticulously attached by hand, the number 12 and the hour and minute hands. By integrating the illuminating pigments into the respective hybrid ceramic moulded part, a high concentration of illuminant is achieved, resulting in extreme light intensity and perfect readability in the dark.
However, the redesign of the case of the 903 St II, in particular, once again demonstrates our company's high level of innovation. This case features a silver-electroplated bezel which can be smoothly operated from the outer diameter of the watch. The impressive water resistance of 20 bar testifies to a feat of engineering that has long shaped the SINN brand. The Tri-Compax arrangement of the silver-electroplated counters completes the classic navigation chronograph's design. The crowning glory of this model is its column wheel chronograph movement, which has a power reserve of at least 60 hours when fully wound. Watch connoisseurs will immediately recognise that the SINN logo as an appliqué is another fine detail of a consistently sophisticated watch.
Technical details
Mechanical Movement
- LJP L110
- Self-winding mechanism
- 26 bearing jewels
- 28,800 semi-oscillations per hour
- Seconds stop function
- Anti-magnetic as per DIN 8309
Case
- Case made of stainless steel, polished / brushed
- Sapphire crystal glass in front, anti-reflective on both sides
- Transparent case back made of sapphire crystal glass, anti-reflective on the interior
- Case back screw-fastened
- Winding crown screwable
- Meet the technical requirements for water-resistance, as set out in standard DIN 8310
- Water-resistant and pressure-resistant to 20 bar
- Low pressure resistant
Functions
- Hours, minutes, subsidiary seconds
- Date display
- Chronograph
- Bezel with a logarithmic scale and slide rule function
Dimensions and Weight
- Case diameter: 41mm
- Band lug width: 22mm
- Case thickness: 14.5mm
- Weight without strap: 84g
Dial and Hands
- Black electroplated dial with decorative sunburst
- Number “12” and indices made of hybrid ceramic luminous elements, meticulously attached by hand
- Hour and minute hand-made of hybrid ceramic luminous elements
Warranty
- 2 years
About Sinn
Sinn Watches was founded in 1961 and has long been a big name in horology. The brand was originally focused on producing navigation clocks for cockpits, and this design is reflected in their collection of pilot watches decades later. Sinn promises uncompromising functionality in their watch collections, even in the most demanding conditions. Thanks to industry leading technologies such as Ar-Dehumidifying and antimagnetic construction, Tegiment steel hardening and temperature stabilized movements. It’s not surprising then, that Sinn is praised for their high-quality movements and materials and loved by collectors for their accuracy in extremely adverse conditions.
| Watch Case Back | Screw-down with sapphire display back |
|---|---|
| Watch Case Colour | Silver |
| Watch Case Finish | Brushed and Polished |
| Watch Case Material | Stainless Steel |
| Watch Case Crown | Screw-down |
| Watch Dial | Multi-Layer |
| Watch Diameter | 41mm |
| Watch Functions | Hours, minutes, seconds, date, chonograph |
| Watch Glass | Sapphire with AR coating |
| Watch Movement Type | Automatic |
| Watch Style | Chronograph |
| Watch Thickness | 14mm |
| Watch Water Resistant | 200 Mtrs (20ATM) |
Why choose WatchGecko?
- Over a decade of experience.
- An internationally renowned destination for watch enthusiasts.
- A trusted choice for new buyers entering the world of horology.
- Our passion for watches inspires us to craft straps that enhance timepieces, blending style and functionality seamlessly.
Latest blog posts
New Rolex Releases for Watches and Wonders 2026
It’s called Watches and Wonders, but there’s really only one brand that’s the star of the show. There may be a record 65 brands participating this year, but by the time Tuesday morning comes, the...
The Second Hour Gin Clear Gets an Update for 2026
In the competitive world of modern dive watches, true evolution is rarely about reinvention. Instead, it is about refinement - the kind that listens to enthusiasts, respects heritage, and improves performance where it matters most....
How CITES Laws Affect Buying Watch Straps Across The World
Luxury is all about exclusivity, rarity, quality, and price. Naturally, exotic materials make up a large proportion of luxury goods, materials known for their quality, appearance, and availability or lack thereof. That led luxury product...
The Kompas East - Strap Showcase
Kompas is a young brand founded in 2025 that has combined historical story telling with modern branding and inspiration. This may seem like an unusual combination, but it is not uncommon in this industry and...