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Owners and reviewers widely praise the Sinn 105 St Sa UTC for its legible dial, precise bi-directional bezel action, and the technical, toolish aesthetic of its bead-blasted, TEGIMENT-hardened steel case. The watch is noted for its smooth sweep and snappy date change, with accuracy often within COSC standards, and its vertical day/date display with a German day wheel is a distinctive feature. Some owners find the lug-to-lug distance large for smaller wrists, and the bracelet clasp is considered a weakness by one source, while the non-lumed UTC hand is a deliberate design choice. The Sinn 105 St Sa UTC utilizes a Sellita SW330-1 automatic movement with a 42-hour power reserve and offers 200 meters of water resistance. Overall, the consensus is that owners and reviewers rate the Sinn 105 St Sa UTC highly for its robust build quality and functional tool watch design at its price point.
2 Variants
Lume:Luminescent
Retail MSRP
$1,674
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Avg
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Static data
Case
41mm
Power Reserve
38h
Movement
Automatic
Water Resistance
200m
01
Case Dimensions
Diameter41mm
Thickness11.9mm
Lug-to-Lug—
Lug Width20mm
02
Case Build
MaterialStainless Steel
Finishbead-blasted
Water Resistance200m
03
Crystal & Dial
CrystalSapphire
AR CoatingUnderside
Dial Colorblack
LumeLuminescent
04
Movement
Caliber
TypeAutomatic
Beat Rate28,800 vph (4.0Hz)
Power Reserve38 hours
Jewels25
HackingNo
Hand-WindingNo
ComplicationsDate, GMT
In a nutshell
The Sinn 105 St Sa UTC (ref. 105 St Sa UTC) is an automatic tool watch, with a 41mm stainless steel case, 11.9mm thick, powered by the SW 330-2 movement and a 38-hour power reserve. Water resistance is rated to 200m, under a sapphire crystal, with date, gmt complications. Manufacturer MSRP is $1,998.