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
25
Listings

Families

Classic Timepieces

Diving Watches

Frankfurt Financial District

Instrument Chronographs

Instrument Watches

Ladies Watches

Special Edition

Current Listings

[WTS] Sinn 656 A with H-Link

Sinn 656 A with H-Link

Sinn - 656A · $1,100
This Sinn 656A is in great running condition, serviced recently and has typical signs of wear around the bezel and usual scratches on bracelet and links. It comes with extra links and a pin, sized for a 6.25" wrist.

  • Condition: Great running condition with signs of wear
  • Case size: 41mm diameter
  • Bracelet length: 6.25" wrist size
  • Additional links: 4 extra links
Posted at
Feb 17, 2026, 10:02 AM
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[WTS] Sinn 556 I RS on Strap

Sinn 556 I RS on Strap

Sinn - 556 I RS · $1,175
This Sinn 556 I RS features a black dial with red seconds hand, housed in a satinized stainless steel case. It's powered by the automatic mechanical SW200-1 movement and has a water resistance of 200 meters.

  • Case diameter: 38.5mm
  • Case height: 11.0mm
  • Lug width: 20mm
Posted at
Feb 16, 2026, 11:27 PM
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[wts] Sinn Hydro 403 1st Gen with box. Needs servicing for new battery.

Sinn Hydro 403 1st Gen with box. Needs servicing for new battery.

Sinn - Hydro 403 · $800
A Sinn Hydro 403 in good condition that requires servicing for a new battery, suitable for those familiar with Sinn's specialized service requirements.

  • Condition: good
  • Needs Servicing: true with new battery
  • Location: California
Posted at
Feb 16, 2026, 7:24 PM
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[WTS] Sinn Cowhide Leather Strap w/white stitching

Sinn Cowhide Leather Strap w/white stitching

Sinn - SI-904 · $100
A standard length cowhide leather strap with white stitching, purchased for a Sinn 556.

  • Condition: Like new
  • Material: cowhide leather
  • Stitching color: white
Posted at
Feb 16, 2026, 11:10 AM
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[WTS] Sinn U50 RESERVED

Sinn U50 RESERVED

Sinn - U50
No description provided in the listing.

Posted at
Feb 11, 2026, 10:26 PM
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[WTS] Sinn U1000 (EZM 6) on Tegimented Bracelet, Excellent Condition

Sinn U1000 (EZM 6) on Tegimented Bracelet, Excellent Condition

Sinn - 1011.010 · $3,950
The Sinn U1000 is a flagship of their Einsatzzeitmesser series, introduced in 2008 with a proprietary TEGIMENT process that makes the surface significantly more scratch-resistant than conventional stainless steel.

  • Condition: Excellent
  • Case Size: 44mm x 18mm
  • Depth Rating: 1,000 meters
  • Movement: Sinn Caliber SZ02 (modified Valjoux 7750 Top Grade)
Posted at
Feb 11, 2026, 6:57 PM
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[WTS] Sinn 556 Black MOP

Sinn 556 Black MOP

Sinn - 556 · $1,700
A Sinn 556 Black MOP watch in good condition, available for sale.

  • Condition: good, like an 8.5/10
  • Bracelet type: fine link bracelet
  • Strap condition: barely used
Posted at
Feb 11, 2026, 4:44 PM
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[WTS] Sinn 356 Pilot Rare Panda Price Drop $2️⃣8️⃣0️⃣0️⃣

Sinn 356 Pilot Rare Panda Price Drop $2️⃣8️⃣0️⃣0️⃣

Sinn - 356 Pilot Classic W and 356 Pilot Classic Anniversary · $2,800
A rare Sinn 356 Pilot, one of the limited 25th-anniversary models released in 2023. This watch features a bead-blasted stainless steel case, bicompax layout, and updated Sellita SW510 movement.

  • Case Material1: bead-blasted stainless steel
  • Case Material2: satinized (brushed) stainless steel
  • Diameter: 38.5 mm
Posted at
Feb 11, 2026, 6:35 AM
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[WTS]

Sinn - 155 Limited Brightstar · $3,299
This is a brand new, unworn Sinn 155 Limited BrightStar from 2024, featuring original packaging.

  • Condition: New and unworn
  • Retail price: 3570 USD
  • Limited edition: true
Posted at
Feb 10, 2026, 11:46 PM
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