Sinn 105 St Sa Sport Watch

The Watch

German watchmaker Sinn specializes in crafting high-precision automatic watches with a design deeply rooted in aviation heritage. Discover their latest model, the 105 St Sa. With its sporty yet slightly vintage aesthetic, this watch features a micro-bead-blasted round stainless steel case measuring 41 mm in diameter and 11.9 mm thick. It will win over men who appreciate clean design and serious functionality. The bezel, treated with an anti-scratch coating, serves multiple purposes: it features a unidirectional minute scale for use as a timing instrument, as well as a bidirectional 12-hour scale for setting a second time zone. The dial is protected by a anti-reflective sapphire crystal - tough, scratch-resistant, and built for everyday wear. True to watchmaking tradition, a screw-down crown allows adjustment of the hands and the date window at 3 o'clock. Finally, with its screw-down case back, this watch is water-resistant to 200 meters. The transparent case back lets you admire the movement in action.

The Dial

Be drawn in by this beautiful dial with its rounded shape and black color. At its center, two baton hands sweep through the hours and minutes while a slender orange seconds hand marks the seconds. The hour markers are displayed as indices along a railroad track minute ring. For optimal legibility even in low-light conditions, the hands and indices are coated with a luminescent material. At the 6 o'clock position, a dual date window displays both the day of the week and the current date. The brand signs this creation at the 12 o'clock index.

The Movement

At the heart of this timepiece beats an automatic movement. Swiss-made, the Sellita SW220-1 caliber operates at a frequency of 28,800 vibrations per hour with a 38-hour power reserve. Equipped with 26 jewels, it drives the hands and dual date window with precision and reliability.

The Strap

To complement this stunning watch, you have the choice between two straps. The first, in black cowhide leather, delivers a refined, elegant look. Its orange stitching adds a quality finish, and it fastens with a classic pin buckle. For a sportier vibe, the second strap is crafted from solid stainless steel and closes with a deployment clasp. Please note the 20 mm lug width.

Water Resistance

With a water resistance of 20 atmospheres - equivalent to 200 meters - this model can confidently be called a dive watch. Our watchmaking experts agree: while it handles showers, baths, lap swimming, freediving, and recreational scuba diving with ease, it is not designed for extreme deep-sea diving, where pressure would compromise its seal. Professional divers pushing depth limits should look to models rated 30 ATM or higher. We also recommend keeping the pushers and crown out of reach of water to maintain a perfect seal at all times.