Sinn Spezialuhren – Diving Watches T50 Goldbronze B 500M Edition 2025
The Goldbronze 125, developed and patented by us and used for the
case, the crown and the bezel of this timepiece limited to 300 pieces,
impresses with its exceptional purity and radiates modern elegance and
timeless aesthetics when combined with the dark blue dial.
Click, to see the large size. ▶ BIG FOTO 
With these
attributes, this watch exudes style in leisure, business, and special
occasions alike.
Clear readability and precision
This concept
does not compromise on precise time measurement, thanks to its
minimalist display. Prominent, large sword hands and the restrained
design of all elements irrelevant to diving—such as additional functions
or markings on the dial and captive bezel—form essential design
features.
Click, to see the large size. ▶ BIG FOTO 
For secure readability, especially of reference times in
darkness or under adverse visibility conditions, the watch employs
colour coding: the hour hand and dial indices glow green, while the
minute and second hands, as well as the main marker on the bezel, glow
blue. Additionally, the crown is located at 4 o’clock and prevents
pressure on the back of the hand, even during physically demanding
activities.
Technical elegance with high functionality
The
T50 GOLDBRONZE B embodies a design that emphasizes technical
sophistication and prioritizes operational safety above all else. The
Goldbronze 125 harmonizes seamlessly with the perfectly legible dark
blue dial, giving the watch an elegant appearance. The deep blue also
evokes the depths of the ocean while its silky matte finish provides a
refined contrast to the Goldbronze 125 used for the case, crown and
bezel.
Click, to see the large size. ▶ BIG FOTO 
The robust safety diver’s bezel proves to be an exceptionally
reliable tool for measuring time. Securely attached to the case, it is
both non-detachable and safeguarded against accidental adjustments. This
is the memorable principle behind the simple yet effective anti-twist
mechanism: "Press first, then turn." This ensures the bezel stays in
place under demanding conditions.
Click, to see the large size. ▶ BIG FOTO 
As an additional safety feature, the Ar‑Dehumidifying Technology
enhances functionality and prevents fogging, ensuring reliability even
in challenging environments.
Expertise in metallurgy
With the T50 GOLDBRONZE
B, we once again showcase our exceptional expertise in the field of
metallurgy. To fully appreciate the value of this remarkable timepiece,
it is important to note that we use a proprietary bronze alloy developed
in-house. This Goldbronze 125 is composed of one-eighth gold and
features an exceptionally high degree of purity in its alloy components.
Click, to see the large size. ▶ BIG FOTO 
Bronze, historically favored for a wide range of maritime
applications, takes on a new dimension in
Goldbronze 125. Its
extraordinary purity enhances both skin compatibility and corrosion
resistance to seawater. While
Goldbronze 125 also naturally develops a
darker patina through oxidation, the inclusion of gold in the alloy
significantly reduces its reactivity to environmental influences. As a
result, the surface darkens much more slowly than conventional bronze.
Additionally, light oxidation can be easily removed using the special
Goldbronze cleaning cloth provided with the watch.
Click, to see the large size. ▶ BIG FOTO 
To eliminate the possibility of skin reactions entirely, the
T50 GOLDBRONZE B is equipped with a titanium case back, combining
technical ingenuity with wearer comfort.
Propeller of Submarine U 15 made from ship’s bronze and the T50 GOLDBRONZE crafted from Goldbronze 125
The use of exceptional materials creates a fascinating connection
between our company and the ship’s bronze propeller (commonly referred
to as a ship’s screw) of the submarine U 15, a submarine of the German
Navy’s Class 206. Ship’s bronze has a long-standing tradition,
particularly in the manufacture of ship’s propellers designed for
seawater applications.
Click, to see the large size. ▶ BIG FOTO 
For us, the skin compatibility of case materials in watchmaking is
equally important. The reality is that this characteristic has been
significantly limited in all conventional bronze alloys to date.
Therefore, we have taken the innovative step of further developing
bronze as a case material. The result is our patented
Goldbronze 125
alloy, which was first introduced in
2023 with our diver’s watch, the
T50 GOLDBRONZE.
Click, to see the large size. ▶ BIG FOTO 
The Original – The Propeller of the legendary decommissioned Submarine U 15. This authentic component made from ship’s bronze, weighing approximately 1.1 tons, reliably powered the U 15 above and below water for decades. Today, this impressive propeller proudly adorns our company headquarters.
Click, to see the large size. ▶ BIG FOTO 
Goldbronze 125 represents a breakthrough by combining the maritime
heritage of bronze with improved skin compatibility and enhanced
resistance to seawater, making it a revolutionary choice in the world of
watchmaking.
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Technical details
The Instrument Diving Watches
Click, to see the large size. ▶ BIG FOTO 
Art-Nr. 1052.062
Limited to 300 pieces
Dark blue dial
Case, crown, and bezel made of Goldbronze 125, bead-blasted
Case back made of high-strength titanium
Tested based on European diving equipment standards and certified by an
independent institute
Water-resistant and pressure-resistant to 500 meters diving depth (50 bar), certified by an independent institute
Captive Safety Diver's Bezel with guard to prevent accidental misadjustment
Colour-differentiated luminous paint for minute hand, second hand and key mark on the bezel for clear reading of set time
Crown at 4 o’clock to prevent pressure on the back of the hand
Ar‑Dehumidifying Technology enhances functional reliability and freedom from fogging
Sapphire crystal
Low pressure resistant
Movement
Calibre SW-300-1
Self-winding mechanism
25 bearing jewels
28,800 semi-oscillations per hour
Seconds stop function
Anti-magnetic as per DIN 8309
Case
Material: Goldbronze 125, bead-blasted
Diameter: 41 mm
Thickness: 12.30 mm
Sapphire crystal in front, anti-reflective on both sides
Crown screwable
Case back made of high-strength titanium, screw-fastened
Water-resistant to 500 meters (50 bar)
Case diameter: 41 mmBand lug width: 20 mmCase thickness: 12.30 mmWeight without strap: 73 grammeMeet the technical requirements for waterproofness, as set out in standard DIN 8310
Waterproof and pressure-resistant to 500 m diving depth (= 50 bar), certified by DNV
According to the technical demands for the diving norm DIN 8306
Tested based on European diving equipment standards EN 250 / EN14143, certified by DNV
Low pressure resistant
SINN Technologies
Captive safety bezel
Ar‑Dehumidifying Technology enhances functional reliability and freedom from fogging
Functions
Hours, minutes, seconds
Date display
Diver's bezel with minute ratcheting and
luminous key mark
Colour-differentiated luminous paint for minute hand, second hand and key mark on the rotating bezel for clear reading of set time
SINN Technologies
Black Hard Coating on a TEGIMENT Technology basis
Captive diver's bezel
Dial
Dark blue dial
Indices coated with luminescent colour
Hour, minute and second hand coated with luminescent colour
Strap
Blue textile strap
🔒 Warranty • 3 years
• Limited to 300 pieces
🔴 Price : € 4,980💰
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Press Release - 2025
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SINN SPEZIALUHREN GMBH
Im Füldchen 5–7 • 60489 Frankfurt am Main
• Tel. +49 (0)69 / 97 84 14-0
• Fax +49 (0)69 / 97 84 14-201
• info@sinn.de
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