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
29
Listings

Families

Classic Timepieces

Diving Watches

Frankfurt Financial District

Instrument Chronographs

Instrument Watches

Ladies Watches

Special Edition

Current Listings

[WTS] Sinn 556i

Sinn 556i

Sinn - 556i · $1,000
A Sinn 556i sold due to being too small for the seller's wrist. The watch comes with its original box, card, and manual.

  • Condition: Pre-owned with flea bite
  • Strap: 20mm BluShark Black and Grey nato
  • Accessories: box,card,manual
Posted at
Feb 22, 2026, 7:59 PM
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[WTS] Sinn 104 st sa A ($1,500) and Bausele onyx classic field ($500)

Sinn 104 st sa A ($1,500) and Bausele onyx classic field ($500)

Sinn - 104 st sa A · $1,500
For sale are a Sinn 104 st sa A and a Bausele Onyx Classic Field watch. Both come with box and papers.

  • Condition: great working order, some signs of wear
  • Box and papers included: yes
  • Rubber strap on the bausele is aftermarket: true
Posted at
Feb 22, 2026, 2:40 PM
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[WTS] Sinn 556 i RS

Sinn 556 i RS

Sinn - 556 i RS · $1,150
A Sinn 556 i RS with a glossy black dial and brilliant white indices is being sold. The watch features a striking red seconds hand, sapphire crystal, and Sellita SW200-1 automatic movement.

  • Condition: Pre-owned - like new
  • Case diameter: 38.5mm
  • Thickness: 11mm
  • Lug width: 20mm
Posted at
Feb 22, 2026, 9:55 AM
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[WTS] Sinn EZM1 mission timer

Sinn EZM1 mission timer

Sinn - EZM1 · $5,600
The Sinn EZM1 is a mission timer watch that features a Lemania 5100 self-winding mechanism and 17 bearing jewels. It has a case diameter of 40mm and is made of titanium.

  • Condition: Pre-owned, serviced in 2018
  • Case Material: titanium
  • Case Back Material: titanium
  • Crystal Type: sapphire
Posted at
Feb 21, 2026, 4:35 PM
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[WTS] Sinn U50 Rubber strap with quick adjust OTF clasp.

Sinn U50 Rubber strap with quick adjust OTF clasp.

Sinn - U50 · $190
For sale is a Sinn U50 Rubber strap with quick adjust OTF clasp, barely worn and cut to fit the seller's wrist.

  • Condition: barely worn
  • Strap material: rubber
  • Clasp type: quick adjust OTF
  • Retail price: $390
Posted at
Feb 21, 2026, 4:28 PM
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[WTS] Sinn 856.011 – Box Only – Extra Straps $1,500

Sinn 856.011 – Box Only – Extra Straps $1,500

Sinn - 856.011 · $1,500
A classic German tool watch known for its clean design, exceptional legibility, and rugged everyday performance. This reference features Sinn's utilitarian aesthetic and is well regarded as a no-nonsense daily wearer.

  • Condition: Pre-owned with signs of wear; mark on hour hand; clean crystal
  • Case Size: 40mm diameter
  • Movement: Automatic
  • Crystal Type: Sapphire
Posted at
Feb 21, 2026, 1:06 PM
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[WTS] Sinn EDM 3 JDM limited edition

Sinn EDM 3 JDM limited edition

Sinn - EDM 3 JDM · $2,850
A rare limited edition watch produced for the Japanese market, sharing the same technology as the EDM3 and EDM3F with some aesthetic differences.

  • Wrist size compatibility: 7.25"
  • Market: Japanese
Posted at
Feb 21, 2026, 12:16 PM
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[WTS] Sinn U50 Fully Tegimented 20mm H-Link Bracelet - Brand New In Box - Stickered - $700+ retail, $525 shipped CONUS

Sinn U50 Fully Tegimented 20mm H-Link Bracelet - Brand New In Box - Stickered - $700+ retail, $525 shipped CONUS

Sinn - U50 · $525
This Sinn U50 is a fully tegimented watch constructed of submarine steel, available brand new in the box with sticker.

  • Bracelet size: 20mm H-Link
Posted at
Feb 20, 2026, 5:39 PM
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[WTS] Sinn U50-T DS Fully Tegimented Limited Edition on H-Link Bracelet 2024

Sinn U50-T DS Fully Tegimented Limited Edition on H-Link Bracelet 2024

Sinn - U50-T DS · $3,300
This Sinn U50-T DS is a limited edition watch featuring tegiment hardening and a unique distressed-look dial finish. The watch has been well-maintained by its single owner since purchase in 2024.

  • Condition: Pre-owned (1 owner since 2024)
  • Case dimensions: mm case X lug width X 41h (lug to lug) X cc with crystal
  • Bracelet condition: fully linked with tools
  • Box and papers: yes, 2024 from watchbuys
Posted at
Feb 20, 2026, 10:09 AM
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