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 556 A RS

Sinn 556 A RS

Sinn - 556 A RS
No description provided

Posted at
Jan 12, 2026, 4:31 PM
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[WTS] Sinn 556 A RS

Sinn 556 A RS

Sinn - 556 A RS
Posted at
Jan 12, 2026, 4:28 PM
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[WTS] 2022 Sinn U50 MOP Perlmutt - Full set

2022 Sinn U50 MOP Perlmutt - Full set

Sinn - U50 MOP Perlmutt · $3,250
The Sinn U50 Mother of Pearl is a limited edition watch featuring a high-quality mother of pearl dial, a fully tegimented and PVD coated case/bracelet, and impressive specifications such as 500m water resistance and a 41mm diameter.

  • Condition: Very good
  • Water Resistance Depth Rating: 500m
  • Case Diameter: 41mm
  • Thickness: 11mm
Posted at
Jan 11, 2026, 10:58 PM
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[WTS] Sinn EZM1 Titanium 503 “Einsatzzeitmesser” EMZ aka Mission Timer!

Sinn EZM1 Titanium 503 “Einsatzzeitmesser” EMZ aka Mission Timer!

Sinn - EZM1 Titanium 503 · $6,200
A performance German tool watch with a mission timer complication, featuring a rotating bezel and screw-down crown. The titanium case has a luxury attention to detail.

  • Condition: Used with light signs of wear
  • Case Size: 40mm
  • Lug Width: 20
  • Length: 46.5h
Posted at
Jan 11, 2026, 7:49 PM
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[WTS] Sinn x Audi Design "Circle" 36mm Limited Edition ref. 9901.040

Sinn x Audi Design "Circle" 36mm Limited Edition ref. 9901.040

Sinn - 9901.040 · $850
This Sinn x Audi Design 'Circle' Limited Edition features a black dial and is housed in a 36mm case, with a thickness of 10.5mm.

  • Condition: Excellent, with very good leather strap
  • Movement: Swiss automatic
  • Diameter: 36mm
  • Thickness: 10.5mm
Posted at
Jan 11, 2026, 7:14 PM
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[WTS] Sinn 356 Chronograph Copper / Salmon Dial

Sinn 356 Chronograph Copper / Salmon Dial

Sinn - 356 Chronograph · $2,500
This Sinn 356 Chronograph features a copper and salmon dial. The watch is approximately from 2004, as indicated by the case back engraving "MINH 2004" and SUG case maker stamp on the lugs.

  • Year: approximately 2004
  • Case maker stamp location: 6pm lugs
Posted at
Jan 11, 2026, 9:45 AM
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[WTS] Sinn U50 Mother of Pearl

Sinn U50 Mother of Pearl

Sinn - U50 · $3,525
This Sinn U50 Mother of Pearl diver is a pre-owned watch that has been well-maintained, showing almost no signs of use. It includes several extras such as original box, warranty card, and additional strap.

  • Condition: pre-owned with minimal wear
  • Case size: 45mm diameter
  • Water resistance: 20 bar
Posted at
Jan 10, 2026, 4:02 PM
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[WTS] Sinn 556I + extra straps & Steel reef extension

Sinn 556I + extra straps & Steel reef extension

Sinn - 556I · $1,375
This Sinn 556I is a good condition timepiece with some minor wear, featuring a sapphire crystal and a Steel Reef extension link. It comes with extra straps and is running smoothly, although the crown has some sticking issues.

  • Condition: good, with minor scratches and some wear
  • Crystal: sapphire
  • Case: 40mm diameter, with scratches and small nick
  • Bracelet: 7" wrist size, 3 extra links, Steel Reef on the fly extension link installed
Posted at
Jan 9, 2026, 4:29 PM
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[WTS] Sinn 556 Excellent condition

Sinn 556 Excellent condition

Sinn - 556 · $1,250
A Sinn 556 sold in excellent condition, complete with its original box and accessories.

  • Condition: Excellent
  • Price includes: PayPal GS by invoice
Posted at
Jan 9, 2026, 8:50 AM
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