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
46
Listings

Families

Classic Timepieces

Diving Watches

Frankfurt Financial District

Instrument Chronographs

Instrument Watches

Ladies Watches

Special Edition

Current Listings

[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 556A — Great Daily Wear, Fresh Service — 38.5mm — $999 Shipped (Tariff Covered)

Sinn 556A — Great Daily Wear, Fresh Service — 38.5mm — $999 Shipped (Tariff Covered)

Sinn - 556A · $999
The Sinn 556A is a great daily wear watch with a clean dial and strong lume. It features an ETA 2824 automatic movement, recently serviced, and comes with a new Epsom leather strap.

  • Condition: Good condition with normal signs of wear
  • Case size: 38.5mm diameter
  • Lug-to-lug length: ~45.5mm
  • Thickness: ~11mm
Posted at
Apr 30, 2026, 10:26 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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[WTS] Sinn 903 ST II - Black Dial - Fine link bracelet full

Sinn 903 ST II - Black Dial - Fine link bracelet full

Sinn - 903 ST II · $4,000
Up for sale is the new version of the Sinn 903 St II in excellent condition, with a very clean case and bracelet.

  • Condition: Excellent overall condition
  • Case size: 41mm case diameter
  • Movement: Manufacture La Joux-Perret L110
  • Bracelet links: Full links
Posted at
Apr 29, 2026, 7:29 PM
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[WTS] Sinn U212 SDR #77/212 Limited Edition

Sinn U212 SDR #77/212 Limited Edition

Sinn - U212 SDR #77/212 · $3,500
A limited edition Sinn U212 SDR tegimented watch with a stainless steel case and black hard coating bezel. It features Ar-Dehumidifying Technology to prevent fogging and is certified by Germanischer Lloyd for diving.

  • Condition: Like new with one tiny scratch (1mm)
  • Year Purchased: 2012
  • Straps: Original uncut leather strap and Sinn leather strap
  • Scratch Location: side of the case around the 9:30 mark
Posted at
Apr 29, 2026, 6:54 PM
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[WTS] Sinn 556.17309 55th Anniversary LE

Sinn 556.17309 55th Anniversary LE

Sinn - 556.17309 · $1,600
This listing is for a Sinn 556 55th anniversary limited edition, one of only 1000 made.

  • Condition: Great condition
  • Year: Limited edition (one of 1000)
  • Bracelet: Desk Diver
  • Straps included: Yes, Sinn leather strap
Posted at
Apr 29, 2026, 12:58 PM
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[WTS] Sinn 356, acrylic, 7750, SUG

Sinn 356, acrylic, 7750, SUG

Sinn - 356 · $1,650
Sinn 356 featuring an acrylic crystal and ETA 7750 movement, in good working order with a water-resistant case.

  • Crystal type: acrylic
  • Movement: ETA 7750
Posted at
Apr 29, 2026, 7:06 AM
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