Sinn (Germany) 105 St Sa UTC – Ref. 105.020 – The Sporty GMT Watch With Second Time Zone On Black Silicone

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1 in stock

Localtime Ltd (Cyprus) is an Authorised Distributor for Sinn Spezialuhren (Germany). Contact us for any models you do not see listed here.

” Winner of the Red Dot Product Design Award 2021, the 105 is a technical, sporty look complemented by a diverse range of functions: with this watch, we have managed to combine uncompromising function and high-quality design in a whole new way. It’s not only the reduced, contemporary form that wins over watch experts, but also the fact that the timepiece can be used as a versatile instrument. Using the bidirectional rotating bezel with 24-hour ratcheting, you can set up a second time zone. As a result, adjusting the local time only takes a few seconds, without you having to adjust the orange UTC hand using the crown. Of course, you can also set the UTC hand in the conventional way using the crown and leave the rotating bezel in its initial position. The arrow-shaped UTC hand can also be used to roughly determine cardinal points, when the current position of the sun is visible. If you’re located in the northern hemisphere, position the dial horizontally and turn the watch so that the 12-hour hand (ignoring daylight savings time) points to the sun. The 24-hour hand then points to the north. The rotating bezel itself has a captive connection to the bead-blasted case. Its Black Hard Coating on a TEGIMENT Technology basis lends the watch a professional overall look. The dial comes in matt black with accents in orange. Also, take the time to have a closer look at all the details of the mechanical movement through the anti-reflective transparent case back made from sapphire crystal. Listed price includes the black silicone strap with pin clasp buckle as in the main photo. Other photos showing the watch on other strap types are for presentation only. If you prefer a different type of strap, feel free to contact us for availability.”



  • Sellita Cal. SW 330-2
  • Self-winding mechanism (automatic)
  • 25 bearing jewels
  • 28,800 semi-oscillations per hour
  • Stop-seconds function
  • Anti-magnetic as per DIN 8309


  • Case made of stainless steel, bead-blasted
  • Sapphire crystal glass in front, anti-reflective on both sides
  • Transparent case back made of sapphire crystal glass, anti-reflective on the interior
  • Screw-fastened case back
  • Screw-down crown
  • Meets the technical requirements for waterproofness, as set out in standard DIN 8310
  • Waterproof and pressure-resistant to 20 bar
  • Low pressure resistant


  • Hours, minutes, seconds
  • Date display
  • Rotating bezel with 24-hour ratcheting
  • Second time zone on a 24-hour basis

Sinn Technologies:

  • Captive bezel
  • Bezel with Black Hard Coating on a TEGIMENT Technology basis

Dimensions And Weight:

  • Case diameter: 41 mm
  • Band lug width: 20 mm
  • Case thickness: 11,9 mm
  • Weight without strap: 73 gramme

Dial And Hands:

  • Matte black dial
  • Indices coated with luminescent colour
  • Hour, minute and second hand coated with luminescent colour

Warranty: 2 years

Straps: We carry a large selection of Sinn replacement straps (with or without buckles), listed separately in our store.

N. B. EXPLANATION OF UTC: Universal Time Coordinated (UTC) = coordinated world time, since 1975 (15th General Conference on Weights and Measures) the basis both for legal time and also for scientific-technical applications in astronomy, navigation and electronic communication. The UTC scale is not an astronomically based time, rather it is calculated from the coordination of roughly 250 atomic clocks worldwide. The irregular rotation of the Earth results in small discrepancies to GMT using this definition. However, reference to the mean solar time at 0 degrees longitude is necessary for navigation purposes, and so UTC is adjusted to the astronomically anchored GMT by means of leap seconds. This adjustment is made once per year if the deviation between the two times has grown to more than 0.9 seconds. Central European Time (CET) is UTC plus one (or two) hours (daylight savings time). The letters GMT or UTC on watches indicate that a second time zone can be read off.


Sinn (Germany)

Production Period

Brand New


105 St Sa UTC – Ref. 105.020


Time, Date, UTC, Rotating Bezel




25j Sellita SW Cal. 330-2

Case Material

Stainless Steel

Case Back

Stainless Steel – Exhibition Sapphire

Case Size

41mm case, 44mm counting the screw-in crown at 3h

Lug Width



Brand New – 2 Years Manufacturer's Warranty


FREE (Express & Fully Insured)