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.

1
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 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 · $3,800
A highly sought-after, limited edition Sinn U50 S L with a fully luminous dial and Tegimented DLC coating. This diver's watch is paired with a black H-Link bracelet and features a SW300-1 movement running within +2 seconds per day.

  • Condition: Excellent
  • Diameter: 41mm
  • Thickness: 11.2mm
  • Bracelet size: sized for a 6.7-inch wrist
Posted at
Apr 23, 2026, 1:34 PM
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[WTS] Sinn 157 Ti/St Military Chronograph | Legendary Lemania 5100 | Matte German Tool Watch | Good Condition | All Original | $1400 (SERVICED)

Sinn 157 Ti/St Military Chronograph | Legendary Lemania 5100 | Matte German Tool Watch | Good Condition | All Original | $1400 (SERVICED)

Sinn - 157 Ti/St Military Chronograph · $1,400
The Sinn 157 is a tool watch built for function and legibility, featuring the Lemania 5100 movement with a central minutes chronograph hand. It has a matte steel finish, a dial that has aged beautifully, and luminous markers with a warm patina.

  • Condition: Good Condition
  • Movement: Lemania 5100 Automatic Chronograph
  • Dial: Matte black military dial with tritium patina
  • Case: 41mm bead-blasted steel, 15mm thickness, 46mm lug-to-lug diameter
Posted at
Apr 23, 2026, 10:38 AM
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[WTS] Sinn 556 Annivesary 1961-2016 LE w/ H-link bracelet

Sinn 556 Annivesary 1961-2016 LE w/ H-link bracelet

Sinn - 556 Annivesary 1961-2016 LE · $1,500
This Sinn 556 Anniversary watch is a limited edition model from 1961-2016, featuring an H-link bracelet. It's in great condition overall, with some minor marks.

  • Condition: great condition with minor scratches and hairlines on bracelet and case, outer AR coating has some hairlines
  • Bracelet type: H-link
  • Accessories included: full-kit (excluding Sinn tool)
  • Shipping method: Fedex
Posted at
Apr 23, 2026, 12:50 AM
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[WTS] Sinn 556i Blue

Sinn 556i Blue

Sinn - 556i · $1,650
The Sinn 556i Blue is a GADA watch with a blue dial that's perfect for summer. It features a silver rotor and has been worn lightly only four times.

  • Condition: Like New and truly excellent condition
  • Watch Diameter: 38.5mm diameter
  • Lug Width: 20mm lug width
  • Lug To Lug: 45.5mm lug to lug
Posted at
Apr 22, 2026, 8:12 PM
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[WTS] Sinn 556 I RS with strap

Sinn 556 I RS with strap

Sinn - 556 I RS · $1,250
Up for sale is my Sinn 556 I RS purchased on 7/25/25. It comes with all original packaging and receipt.

  • Condition: Very good
  • Purchase Date: 7/25/2025
  • Original Straps Condition: Brand new
  • Warranty Status: Under warranty
Posted at
Apr 22, 2026, 5:25 PM
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[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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