Sinn

Founded in 1961 by flight instructor Helmut Sinn, the brand has established itself as a leader in professional tool watches. Their innovations include oil-filled cases for perfect underwater legibility and Tegiment technology for enhanced scratch resistance. The brand's expertise spans from pilot chronographs to professional diving watches, with collections like the U-series and 756/956 demonstrating their technical prowess. Each timepiece showcases their commitment to creating robust, functional instruments that meet the highest professional standards.

155
Watches
7
Families
47
Listings

Families

Classic Timepieces

Diving Watches

Frankfurt Financial District

Instrument Chronographs

Instrument Watches

Ladies Watches

Special Edition

Current Listings

[WTS] Sinn 556 w/ complete kit

Sinn 556 w/ complete kit

Sinn - 556 · $1,350
This Sinn 556 is a 2022 model that has been worn daily and comes in its original box, papers, and certification. It shows some signs of wear but still looks beautiful.

  • Condition: Good with signs of wear
  • Year: 2022
  • Band size: 7.5 inches
Posted at
May 1, 2026, 2:19 AM
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[WTS] Sinn 556 I RS

Sinn 556 I RS

Sinn - 556 I RS · $1,375
A Sinn 556 I RS from 2022 in good condition with a perfect crystal and accurate timekeeping. It comes with its original box, tools, papers, and certificate, as well as a leather strap.

  • Condition: good condition
  • Year: 2022
  • Owner history: 2nd owner
Posted at
May 1, 2026, 1:06 AM
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[WTS] Sinn U15 - Full Set (1/1000 Limited Edition)

Sinn U15 - Full Set (1/1000 Limited Edition)

Sinn - U15 · $3,700
This is a limited edition Sinn U15 watch, featuring a seawater resistant German submarine steel case and a decommissioned U-15 submarine steel bezel.

  • Case Material: German Submarine Steel
  • Bezel Material: Decommissioned U 15 Submarine Steel, Tegimented Case
  • Case Diameter: 41mm diameter
Posted at
Apr 30, 2026, 8:53 PM
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[WTS] Super Rare Sinn 356 UTC – travel time – $4,999

Super Rare Sinn 356 UTC – travel time – $4,999

Sinn - 356 UTC · $4,999
This rare Sinn 356 UTC edition features a travel time function. It's in worn but good condition and comes with a Delugs strap sized for a 7 inch wrist.

  • Condition: Worn but good condition
  • Size: delugs strap sized for a 7 inch wrist
Posted at
Apr 30, 2026, 1:53 PM
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[WTS] Sinn U50 S L - LE Full Lume Dial - 363/500

Sinn U50 S L - LE Full Lume Dial - 363/500

Sinn - U50 S L · $2,700
Highly sought-after Sinn U50 S L, one of only 500 pieces worldwide with a limited edition full lume dial. Signed warranty card and instruction manual included.

  • Serial Number: 363/500
  • Warranty: signed warranty card
  • Case Condition: Sinn box was trashed, using aftermarket travel case
Posted at
Apr 30, 2026, 11:59 AM
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[WTS] Sinn U50 S L - Limited Edition Full Lume Dial 363/500 - Papers, No Box

Sinn U50 S L - Limited Edition Full Lume Dial 363/500 - Papers, No Box

Sinn - U50 S L · $2,700
A highly sought-after limited edition Sinn U50 S L with a full lume dial and one of only 500 pieces worldwide. It comes with the signed warranty card and instruction manual.

  • Limited edition number: 363/500
  • Papers included: true
Posted at
Apr 30, 2026, 11:42 AM
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[WTS] Sinn 836/ Box, Papers, leather strap & H link bracelet

Sinn 836/ Box, Papers, leather strap & H link bracelet

Sinn - 836 · $1,850
This Sinn 836 is a tool watch that blends clean pilot aesthetics with true Sinn engineering. It features Tegimented steel for added scratch-resistance and comes with both the original H-link bracelet and a genuine leather strap. The watch is powered by an automatic movement and offers excellent legibility, anti-magnetic protection, and a no-nonsense build quality.

  • Condition: Good condition, shows signs of use
  • Bracelet type: H-link
  • Movement: automatic
Posted at
Apr 29, 2026, 11:32 PM
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[WTS] Sinn EZM3 - Full Kit

Sinn EZM3 - Full Kit

Sinn - EZM3 · $1,400
The Sinn EZM3 is a high-quality automatic watch with a 41mm diameter case, featuring a unidirectional dive bezel and sapphire crystal. It has an ETA 2824-2 or Sellita SW200-1 movement and a water resistance of up to 500m.

  • Condition: 9/10
  • Case diameter: 41mm
  • Thickness: 12.3mm
  • Lug width: 20mm
Posted at
Apr 29, 2026, 9:51 PM
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[WTS] Sinn 356 Flieger Day-Date Chronograph Copper Beauty 38.5mm Full Kit $2500

Sinn 356 Flieger Day-Date Chronograph Copper Beauty 38.5mm Full Kit $2500

Sinn - 356 · $2,500
The Sinn 356 is a compact, classic pilot chronograph with excellent legibility and unmistakable tool-watch DNA. It measures 38.5mm in diameter.

  • Case diameter: 38.5mm
  • Lug width: 20mm
  • Crystal material: sapphire
Posted at
Apr 29, 2026, 8:28 PM
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