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Functionality with character - in the finest Sinn tradition. The 104 St Sa I is a classic pilot watch, a winner not just because of its functionality and dependable accuracy but because of its bold character too. The dial is clearly structured, the three hands ensuring optimum readability of the time, date and day of the week. A particular highlight is the sapphire crystal glass transparent back, which allows the filigree work of the mechanical movement to be admired in all its fascinating intricacy.

Particular appeal for aviation fans

The bi-directional pilot's bezel gives this exclusive timepiece its unmistakable charm. It features minute ratcheting and is securely attached to the case. The key mark is a triangle, treated with luminous lacquer to make it visible in the dark.


  • Size (Ø): 41mm
  • Strap length: 216mm
  • Strap width: 22mm
  • Weight: 80g
  • Material: stainless steel (polished), leather* sapphire crystal (anti-reflective on both sides)
  • Colour: stainless steel/dark brown


  • SW220-1 mechanical movement
  • 26 ruby bearing jewels
  • 28,800 semi-oscillations per hr.
  • Self-winding
  • Power reserve minimum 40 hrs.
  • Pressure-resistant up to 20bar**
  • Screw-fastened case back
  • Transparent case back of sapphire crystal glass, (anti-reflective on one side)
  • Screw-in crown
  • Anti-magnetic to DIN 8309
  • Securely attached pilot's bezel with luminous key mark and minute ratcheting
  • Second-stop mechanism
  • Analogue time display
  • Hours, minutes, seconds, date, day
  • Luminous indices and hours, minutes and seconds hands
  • Pin buckle
  • Made in Germany


 Included in delivery

  • Sinn 104 St Sa I Pilot Watch

*Contains non-textile parts of animal origin.

**Fulfils the technical requirements of DIN 8310 for waterproofness, resistant to negative pressure. The leather strap is not suitable for contact with water.