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 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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[WTS] Price Dropped! Sinn 104 I St Sa – Full Set –Sinn Bracelet & Leather Band $1,299 Shipped 🎉 New Year Sale

Price Dropped! Sinn 104 I St Sa – Full Set –Sinn Bracelet & Leather Band $1,299 Shipped 🎉 New Year Sale

Sinn - 104 I St Sa · $1,299
This is a versatile and well-loved pilot watch, offered as a full set and ready for its next wrist. It features an automatic Sellita SW220-1 movement and excellent Sinn lume.

  • Condition: Very good overall
  • Movement: Sellita SW220-1 Automatic Movement
  • Case size: 41mm diameter
  • Crystal: Sapphire (front & display caseback)
Posted at
Jan 9, 2026, 2:52 AM
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[WTS] Sinn 910 Anniversary $4,950

Sinn 910 Anniversary $4,950

Sinn - 910 Anniversary · $4,950
a Sinn 910 Anniversary watch is being sold for $4,950. The additional details can be found in the Imgur link provided.

  • Image: https://imgur.com/a/OMJW7XL
Posted at
Jan 8, 2026, 9:01 PM
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[WTS] Sinn EZM3 41mm Full Kit 09/2022 $1550

Sinn EZM3 41mm Full Kit 09/2022 $1550

Sinn - EZM3 · $1,550
A straightforward and highly capable German tool watch built for professional use. It's a great everyday wearer due to its clean design and extreme durability.

  • Condition: Like new, minor cosmetic damage (ding on lower left lug)
  • Case diameter: 41mm
  • Thickness: 12.3mm
  • Lug-to-lug: 47mm
Posted at
Jan 7, 2026, 6:07 PM
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