Gerald Charles Unveils Its Most Complex Timepiece, The Masterlink Perpetual Calendar

Gerald Charles, the independent Swiss watchmaking Maison founded by the great Mr. Gérald Charles Genta, unveils its most complicated watch since its reestablishment less than a decade ago. The Masterlink Perpetual Calendar, developed entirely in-house, marks a new chapter for the young and ambitious Maison as it continues to expand its repertoire of poetic complications.

In keeping with Gerald Charles’s “No Compromise” watchmaking philosophy, established by Mr. Genta more than a quarter of a century ago, the Masterlink Perpetual Calendar introduces an in-house, asymmetrical, automatic perpetual calendar calibre with a three-counter display.

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Introducing Sinn Launches the U50 B

A new blue colorway for one of Germany’s most capable dive watches

ByWaqt

26.10.2025

3 minutes read

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Sinn has built its reputation on precision engineering, practicality, and reliability, producing some of the most robust tool watches in German watchmaking. Among its most celebrated creations is the U50 collection, a series that combines professional diving performance with the minimalist aesthetic that defines Sinn. In its latest addition, the brand introduces the U50 B, continuing this philosophy with a fresh matt-blue dial.

The watch features a bead-blasted case crafted from high-strength, seawater-resistant German Submarine Steel, a material prized for its exceptional resistance to corrosion and magnetic interference. Measuring 41 mm in diameter and 11.15 mm in thickness, the case maintains a compact and balanced profile ideal for both diving and everyday wear. It is fitted with a sapphire crystal featuring anti-reflective coating on both sides and a unidirectional captive diver’s bezel. The bezel also benefits from Sinn’s Tegiment Technology, which significantly enhances scratch resistance. The crown is positioned at 4 o’clock for optimal comfort.

The screw-fastened caseback ensures durability and protection under pressure. The U50 B is certified by an independent institute for diving performance and is water-resistant to 500 meters. It also meets low-pressure resistance standards, guaranteeing reliability in a wide range of environments.

The matt-blue dial features bold white hands and indices coated with green-glow luminescent material, ensuring excellent readability. A date window is neatly positioned at 3 o’clock.

Inside the watch beats the automatic SW300-1 caliber, operating at a frequency of 28,800 vph and offering a 42-hour power reserve. It includes a stop-seconds function and provides anti-magnetic protection in accordance with DIN 8309 standards.

Sinn offers the U50 B with a variety of strap options to suit different preferences and occasions. Choices include a robust stainless steel bracelet, a flexible rubber strap, or a leather or textile strap for a more casual look.

The U50 B joins Sinn’s permanent collection and is priced at EUR 2,700 (approximately AED 11,510) on a steel bracelet, EUR 2,560 (approximately AED 11,000) with a rubber strap, and EUR 2,350 (approximately AED 10,020) with a leather or textile strap.

For more information, visit Sinn’s official website.

Technical Specifications: Sinn U50 B

Case: German Submarine Steel, sapphire crystal with anti-reflective coating on both sides, unidirectional captive diver’s bezel with Tegiment Technology, crown at 4 o’clock
Diameter: 41 mm
Thickness: 11.15 mm
Water Resistance: 500 meters
Dial: Matt-blue, white hands and indices with green-glow luminescent coating, date window at 3 o’clock
Movement: Calibre SW300-1, automatic
Functions: Hours, Minutes, Seconds, Date
Frequency: 28,800 vph (4 Hz)
Power Reserve: 42 hours
Bracelet/Strap: stainless steel bracelet, rubber strap, or leather/textile strap
Availability: Permanent collection
Price: (bracelet ) EUR 2,700 approx. AED 11,510, (rubber strap) EUR 2,560 approx. AED 11,000, (leather or textile strap) EUR 2,350 approx. AED 10,020