Sinn Instrument 556 A RS Fine-Link Bracelet Watch

The Watch

This exceptional timepiece is presented by the German watchmaking house Sinn. With over 50 years of expertise in the industry, Sinn has built a reputation for extraordinary watches packed with technological innovation. Inspired by aviation, its founder even sent select models into space to prove their perfection. Today, we introduce the 556 A RS. Housed in a brushed stainless steel case measuring 38.5 mm in diameter and 11 mm thick, this model blends a sporty and elegant aesthetic that appeals to both men and women. The dial is protected by a sapphire crystal with anti-reflective coating, offering optimal legibility while guarding against shocks and scratches. At 3 o'clock, a screw-down crown allows hands and date setting, as well as a hacking seconds function. Finally, the screw-down case back ensures water resistance up to 20 atmospheres.

The Dial

This timepiece features a stunning matte round dial. Its timeless black color makes this watch the perfect companion for any occasion. At its center, two hands indicate the hours and minutes, while a slim red seconds hand sweeps through the dial with effortless grace. Time markers include indices, Arabic numerals at 3, 6, 9, and 12 o'clock, and a railroad minute track. The hands and markers are coated in luminescent material for clear nighttime readability. For a modern touch, the date window sits at 4 o'clock. The model is signed by the house at 12 o'clock.

The Movement

At the heart of this watch, the transparent case back reveals a stunning Sellita automatic movement. Featuring 26 jewels, all components run with flawless precision. With a SW200-1 caliber, the hour, minute, and second hands - along with the date window - operate with accuracy and reliability. The oscillation frequency runs at 28,800 vibrations per hour.

The Bracelet

This watch is fitted with a brushed stainless steel bracelet. Its fine links pair effortlessly with both casual and evening looks. Comfortable enough to wear all day long, it fastens with a practical deployant clasp. The lug width measures 20 mm.

Water Resistance

With a water resistance of 20 atmospheres (200 meters), this model qualifies as a genuine dive watch. Our watchmaking experts agree: while this timepiece is more than capable of handling showers, baths, lap swimming, freediving, and recreational scuba diving, it is not designed for extreme deep-sea diving where pressure would exceed its water resistance rating. For professional divers taking on serious depths, we recommend models rated 30 atmospheres and above. We also recommend keeping the crown and pushers away from water contact to maintain a perfect seal.