Sinn Instrument 556 A RS Fine-Link Bracelet Watch

The Watch

German watchmaker Sinn presents this outstanding timepiece. Renowned for over 50 years, the brand is celebrated for crafting high-performance watches powered by technological innovation. Inspired by aviation, its founder even sent select models into space to prove their uncompromising durability. Today, discover the 556 A RS model. Featuring a satin-finished stainless steel case measuring 38.5 mm in diameter and 11 mm thick, it blends sporty aesthetics with refined elegance, designed to suit both men and women. The dial is shielded by an anti-reflective sapphire crystal, offering crystal-clear readability while protecting against scratches and impacts. At 3 o'clock, a screw-down crown allows you to adjust the hands and date, complete with a stop-seconds hacking function. Finally, a screw-down case back ensures water resistance up to 20 ATM.

The Dial

This timepiece features a stunning matte round dial. Its timeless black shade makes it effortlessly wearable for any occasion. At its center, two hands indicate the hours and minutes, while a slim red seconds hand sweeps smoothly across the dial markers. The display is marked by indices, Arabic numerals at 3, 6, 9, and 12 o'clock, and a subtle railway minute track. For optimal legibility in low light, both the hands and markers are treated with a luminescent coating. Adding a modern touch, the date window is neatly positioned at 4 o'clock. The dial is elegantly signed by the brand at 12 o'clock.

The Movement

At the heart of this timepiece, an exhibition see-through case back reveals a superb Sellita automatic movement. Powered by 26 jewels, its internal components run with seamless precision. Driven by the SW200-2 caliber, the hour, minute, and seconds hands along with the date display operate with outstanding accuracy and reliability. It beats at an oscillation frequency of 28,800 vibrations per hour.

The Bracelet

A satin-finished stainless steel bracelet completes this timepiece. Featuring slim links, it effortlessly pairs with both casual daytime and elegant evening looks. Designed for all-day comfort, it is secured with a convenient folding clasp for effortless wear. It has a lug width of 20 mm.

Water Resistance

With a water resistance of 20 ATM (equivalent to 200 meters), this model easily qualifies as a true "diver's watch." Our watchmaking experts confirm that while it is perfectly suited for showers, swimming, freediving, and recreational scuba diving, it is not designed for deep-sea saturation diving where extreme abyss pressures would compromise its seals. For professional divers tackling extreme depths, we recommend opting for 30 ATM models or higher. To maintain full water resistance, avoid using the crown or pushers while submerged!