The Sinn 240 Day-Date St is a no-nonsense tool watch built with the brand’s unmistakable industrial charm. Its cushion-shaped 43 mm stainless-steel case gives it a distinctive, slightly vintage silhouette, while the matte black dial keeps things highly legible with bold white markers, a clear day-date display at 3 o’clock, and Sinn’s signature blocky handset. The internal rotating bezel—controlled via the second crown—adds real utility for timing tasks without disrupting the streamlined case profile. It’s designed with that classic Sinn attitude: functional, purposeful, and ready for work.

On the H-link bracelet, the 240 St takes on a more robust, professional presence while remaining comfortable and well-balanced on the wrist. Inside, a reliable automatic movement powers the watch with the durability you’d expect from Sinn, backed by 100 meters of water resistance and the brand’s reputation for hard-wearing engineering. This is the kind of watch that thrives as a daily companion: sporty enough for the weekend, refined enough for the office, and built with genuine tool-watch credibility. If you want a Sinn that flies under the radar but still delivers everything the brand stands for, the 240 St on H-link is a perfect pick.

Information:

Reference: 240

Dated: 2019

Bracelet: Stainless Steel H Link Bracelet (Bead Blasted) and Black leather strap

Case: 43mm x 11mm Thickness - Stainless Steel (Bead Blasted)

Lug Width: 22mm

Movement: SW200-1 - Automatic

Functions: Hours, Minutes, Second, Date, Day

Box and Papers: Inner/outer boxes, and warranty card

Crystal: Sapphire

Bracelet size: 7.5”

Condition:

Case has minimal light wear. Bracelet has minimal light micro wear. Dial, hands, and crystal have no wear. Watch is running (+3 s/d 322 amp).

History of Sinn Watches

Founded in 1961 by Helmut Sinn, a former World War II pilot and blind flight instructor, Sinn Watch Company quickly gained recognition for its aviation-inspired timepieces. Specializing in navigation clocks and pilot chronographs, Sinn's reputation for precision and durability was cemented during the 1980s and 1990s when their watches accompanied German astronauts on several space missions. These accomplishments demonstrated the brand's commitment to creating reliable timepieces capable of withstanding extreme conditions.

A new era began in 1994 when certified engineer Lothar Schmidt acquired the company, introducing significant technological advancements. Under Schmidt's leadership, Sinn pioneered innovations such as Ar-Dehumidifying Technology, DIAPAL lubrication-free escapements, and TEGIMENT hardened steel cases. Today, Sinn remains at the forefront of horological innovation, producing high-quality timepieces that blend traditional craftsmanship with cutting-edge technology. The brand's dedication to excellence and continuous improvement ensures its lasting legacy in the world of high-end watchmaking.

Sinn

Sinn 240 Day Date St H-Link Bracelet