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
35
Listings

Families

Classic Timepieces

Diving Watches

Frankfurt Financial District

Instrument Chronographs

Instrument Watches

Ladies Watches

Special Edition

Current Listings

[WTS] Sinn U15 41mm Limited Edition 1000 Pcs Dive Watch SW300 - Minty - Full Kit - June 2025 - Made of Decommissioned Submarine Steel - Sold Out - $3550 shipped CONUS

Sinn U15 41mm Limited Edition 1000 Pcs Dive Watch SW300 - Minty - Full Kit - June 2025 - Made of Decommissioned Submarine Steel - Sold Out - $3550 shipped CONUS

Sinn - U15 · $3,550
This Sinn U15 is a unique dive watch made from decommissioned submarine steel, featuring a stunning sheen and a 3D bubble ocean laquered dial. It has a satinized steel case with a 500-meter water resistance and an automatic mechanical movement.

  • Condition: Very good
  • Case material: Decommissioned submarine steel
  • Water resistance: 500m depth rating
  • Diameter: 41mm diameter
Posted at
Apr 22, 2026, 12:14 PM
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[WTS] Sinn U50 - T - $2150

Sinn U50 - T - $2150

Sinn - U50-T · $2,150
A Sinn U50 - T in excellent condition with no visible marks on the case, bezel or crystal. The silicone strap is sized to 7.25 and has normal signs of wear.

  • Condition: Excellent condition
  • Case condition: no visible marks
  • Bezel condition: no visible marks
  • Crystal condition: no visible marks
Posted at
Apr 21, 2026, 9:06 PM
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[WtS] Sinn 556 iRS 2023

Sinn 556 iRS 2023

Sinn - 556 iRS · $1,250
A Sinn 556 i RS in excellent condition, featuring a solid lume and a striking red seconds hand. It keeps great time and has been well-loved by its previous owner.

  • Condition: excellent shape with normal wear
  • Case size: 38.5mm diameter
  • Year: 2023
Posted at
Apr 21, 2026, 9:28 AM
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[WTS] Sinn U50 DS

Sinn U50 DS

Sinn - U50 DS · $2,400
Sinn U50 DS for sale, comes with multiple straps and buckles. Time keeping is fantastic.

  • Condition: like new
  • Warranty: 2 years
  • Time keeping deviation: +1 second on wrist, up to +/− 2 seconds at night
Posted at
Apr 21, 2026, 6:20 AM
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[WTS] Sinn EZM1 mission timer

Sinn EZM1 mission timer

Sinn - EZM1 · $5,000
This Sinn EZM1 mission timer features a titanium case, self-winding mechanism, and is shock resistant. It has a date display and chronograph function.

  • Condition: Excellent, serviced in 2018
  • Case material: titanium
  • Movement: Lemania 5100, semi-oscillations per hour: 28,800
  • Water resistance: 30 bar
Posted at
Apr 20, 2026, 1:35 PM
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[WTS] Sinn 556 Emerald Green Limited Edition

Sinn 556 Emerald Green Limited Edition

Sinn - 556i · $2,000
A Sinn 556i Limited Edition Emerald Green watch, one of only 400 made. It's the seller's most accurate timepiece with minimal wear.

  • Condition: Pre-owned with minor cosmetic damage (small scratches on bezel)
  • Case size: 42mm
  • Water resistance: 100m
  • Accuracy: 1 SPD error
Posted at
Apr 20, 2026, 10:49 AM
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[WTS] Sinn EZM3 black DLC $2500

Sinn EZM3 black DLC $2500

Sinn - EZM3 · $2,500
a tegimented dive watch with DLC finish and left hand crown, featuring a black dial and sapphire crystal

  • Case Diameter: 41.0mm
  • Case Height: 12.3mm
  • Lug Width: 20mm
Posted at
Apr 19, 2026, 6:58 PM
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[WTS] Sinn EZM 3F – Good Condition, Running Well – $1,250 Shipped (See Details)

Sinn EZM 3F – Good Condition, Running Well – $1,250 Shipped (See Details)

Sinn - EZM 3F · $1,250
This Sinn EZM 3F is a solid tool watch ready to wear, keeping good time and running well.

  • Condition: good overall condition
Posted at
Apr 19, 2026, 9:07 AM
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[WTS] Sinn 556 I RS

Sinn 556 I RS

Sinn - 556 I RS · $1,000
The Sinn 556 I RS features a glossy black dial and a striking red seconds hand. The satin-finished stainless steel case is in good condition.

  • Condition: Pre-owned - good condition for a daily worn watch
  • Case Size: 38.5mm diameter
  • Case Thickness: 11mm
  • Lug Width: 20mm
Posted at
Apr 18, 2026, 6:52 PM
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