Sinn

105 St Sa UTC

Reference Number :

105.020

Series : Tool Watch

Retail: $1,854

(As of: 02/2025)

This watch is not for sale, this page is just for reference purposes only. If you would like to purchase this watch, please contact Sinn. If you are interested in selling this watch to us, you can contact us here.

Quick TakeThe Sinn 105 St Sa UTC is not your average timepiece; it's a robust instrument. Dressed in bead-blasted steel, it's subtly bold, with a 24-hour bezel that screams functionality. That TEGIMENT-hardened black bezel, with the vibrant orange UTC hand, hints at adventures beyond local time. The 105 St Sa UTC feels like it's ready for anything, the screw-down crown and sapphire crystal are a testament to that, its 20-bar water resistance encouraging exploration beneath the waves. See the SW330-2 movement work tirelessly. The design is wonderfully German – straightforward with purpose. It’s a watch that conveys a sense of dependable capability. This isn’t a delicate accessory, it’s a companion for those that seek out performance.

DescriptionThe Sinn 105 St Sa UTC (reference 105.020) represents a fusion of utilitarian design and horological engineering. Its 41mm case is constructed from bead-blasted stainless steel, providing a robust, non-reflective finish. The case thickness measures 11.9mm, contributing to a substantial, yet wearable, presence on the wrist. Integral to the watch's functionality is the captive bidirectional rotating bezel, featuring a 24-hour scale. This bezel is treated with Sinn's Black Hard Coating applied on a TEGIMENT Technology basis, enhancing scratch resistance. The bezel’s ratcheting mechanism allows for precise setting of a second time zone, independent of the primary hour and minute hands. The movement powering the watch is the SW 330-2, a self-winding mechanism with 25 bearing jewels. It operates at a frequency of 28,800 semi-oscillations per hour (4 Hz) and includes a seconds stop function for precise time setting.

The mechanical movement is anti-magnetic, adhering to the specifications outlined in DIN 8309. The dial is a matte black, fostering legibility, with indices coated with luminescent material. The hour, minute, and second hands are similarly treated for low-light visibility. An orange-accented UTC hand, arrow-shaped, facilitates the tracking of the second time zone. This UTC hand can secondarily be used to approximately determine cardinal direction; In the northern hemisphere by pointing 12-hour hand towards the sun, will mean the 24-hour hand is pointing to the north. The watch incorporates a sapphire crystal, anti-reflective on both sides, over the dial and a sapphire crystal case back, anti-reflective on the interior, providing a view of the movement. The case back is screw-fastened, securing the watch. The crown is screwable, further contributing to the watch's water resistance. The 105 St Sa UTC meets DIN 8310 standards for water resistance, certified to 20 bar, and is also low-pressure resistant. The watch case alone, with the band removed, is speced at 73 grams in weight. The band lug width is 20 mm.

GenderMen

SignaturesSinn

Country of OriginGermany

Case Size41 mm

MovementAutomatic

CaliberSW 330-2

FunctionsHours, Minutes, Seconds, Date, GMT

Case MaterialsStainless Steel

Bezel MaterialsStainless Steel

Lug MaterialsStainless Steel

Case BackSapphire Crystal

CrownScrew Down