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
42
Listings

Families

Classic Timepieces

Diving Watches

Frankfurt Financial District

Instrument Chronographs

Instrument Watches

Ladies Watches

Special Edition

Current Listings

[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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[WTS] Sinn 105, 41mm, Great Condition

Sinn 105, 41mm, Great Condition

Sinn - 105 ST SA 105.010 · $1,550
This Sinn 105 watch is a 41mm timepiece that has been professionally refinished and comes in great condition with minimal signs of use.

  • Condition: great condition, minimal signs of use
  • Size: 41mm
  • Kit: full kit minus warranty card
Posted at
Apr 28, 2026, 8:40 PM
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[WTS] Sinn U50-T S Black on quick adj bracelet

Sinn U50-T S Black on quick adj bracelet

Sinn - U50-T S · $3,850
A Sinn U50-T S Black fully tegimented watch on an H-Link quick adjust bracelet features automatic mechanical movement and 500m water resistance.

  • Condition: Like new
  • Case diameter: 41.0mm
  • Case height: 11.2mm
  • Lug width: 20mm
Posted at
Apr 28, 2026, 6:55 PM
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[WTS] Sinn 104 | St Sa Black - Full Kit 2021 - Dassari black sailcloth strap + Sinn brown leather strap - Excellent condition - $1250

Sinn 104 | St Sa Black - Full Kit 2021 - Dassari black sailcloth strap + Sinn brown leather strap - Excellent condition - $1250

Sinn - 104 St Sa I Black · $1,250
The Sinn 104 is a versatile, durable, and comfortable watch that works well with casual attire. It's incredibly easy to wear and has been mostly used as a desk diver.

  • Condition: Excellent
  • Movement: Sellita SW220-1 (day/date)
  • Water resistance: 200m
  • Case diameter: 41mm
Posted at
Apr 28, 2026, 6:07 PM
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[WTS] Sinn 103 St Sa Chronograph - H Link bracelet, Box, Card [🇪🇺]

Sinn 103 St Sa Chronograph - H Link bracelet, Box, Card [🇪🇺]

Sinn - 103 St Sa · $1,575
A Sinn 103 St Sa pilot chronograph with day-date complication featuring a stainless steel case and black dial. The watch includes original straps and comes in double box set.

  • Condition: very good with minor cosmetic wear
  • Case diameter: 41mm
  • Movement type: Automatic mechanical chronograph (Valjoux 7750-based)
  • Water resistance depth rating: 200m
Posted at
Apr 27, 2026, 1:22 PM
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