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.

50
Watches
7
Families
34
Listings

Families

Classic Timepieces

Diving Watches

Frankfurt Financial District

Instrument Chronographs

Instrument Watches

Ladies Watches

Special Edition

Current Listings

[WTS] Sinn 104 I St Sa White Dial - Upgraded Easy-Adjust Clasp

Sinn 104 I St Sa White Dial - Upgraded Easy-Adjust Clasp

Sinn - 104 I St Sa · $4,200
A Sinn 104 I St Sa White Dial watch with an upgraded easy-adjust clasp and bonus integrated rubber strap. The watch has a black bezel and is best worn on the H-Link bracelet.

  • Condition: Very good cosmetic condition, minor marks on the case and bezel
  • Bracelet upgrade: easy-adjust, on-the-fly micro-adjustment clasp
  • Strap: black aftermarket integrated rubber strap
  • Accuracy: +25 to +30 seconds fast per day
Posted at
Dec 30, 2025, 11:06 AM
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[WTS] Sinn 22mm Pilot Style Black Cowhide Strap Orange Stitching Medium $130 Shipped

Sinn 22mm Pilot Style Black Cowhide Strap Orange Stitching Medium $130 Shipped

Sinn · $130
A brand new, unused Sinn black cowhide strap with orange stitching for pilot watches.

  • Condition: new, unused
  • Width: 22mm
  • Material: black cowhide leather
  • Stitching: orange contrast stitching
Posted at
Dec 29, 2025, 11:11 PM
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[WTS] Sinn 556a rs

Sinn 556a rs

Sinn - 556a rs · $1,500
This Sinn 556a rs model has a gold rotor that is no longer in production, and it is being sold with some minor hairline scratches on the clasp.

  • Condition: almost-new
  • Has Gold Rotor: yes (no longer in production)
  • Has Hairline Scratches: on the clasp
  • Free Shipping: in the US
Posted at
Dec 29, 2025, 8:57 PM
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[WTS] Sinn 556i RS

Sinn 556i RS

Sinn - 556i RS · $1,099
This Sinn 556i RS is a recent model from 2023, sold with its original box and papers.

  • Condition: Like new
  • Year: 2023
  • Box And Papers: yes
Posted at
Dec 29, 2025, 6:43 AM
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[WTS] Sinn EZM1 Titanium 503 The “Einsatzzeitmesser” EMZ aka Mission Timer!

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

Sinn - EZM1 Titanium 503 · $6,450
The Sinn EZM1 Titanium 503 'Einsatzzeitmesser' or Mission Timer is a performance German tool watch with a titanium case. It features a rotating bezel, screw down crown, and a mission timer complication.

  • Condition: Overall light signs of wear but no damage
  • Case size: 40mm diameter, 46.5h lug to lug
  • Movement: Lemania 5100
  • Bracelet: 20mm H-link bracelet
Posted at
Dec 28, 2025, 7:51 PM
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[WTS] Sinn 656 on H-Link

Sinn 656 on H-Link

Sinn - 656 · $1,100
Up for sale is this beast Sinn 656 A, similar to 556 but with an anti-magnetic/closed case back and 0.5mm thinner than its brother.

  • Case thickness difference: 0.5mm
  • Bracelet size: 7" with extra links
  • Local pick up available: Yes, in New Haven CT
Posted at
Dec 28, 2025, 7:04 PM
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[WTS] Sinn 556A RS - Full Set - 2025

Sinn 556A RS - Full Set - 2025

Sinn - 556A RS · $1,450
a fine German engineering watch with a matte black dial and red second hand, suitable for daily wear.

  • Case diameter: 38.5mm
  • Case height: 11.0mm
  • Lug width: 20mm
Posted at
Dec 28, 2025, 11:48 AM
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[WTS] Sinn 556i Mother of Pearl - Unworn - $1700 + shipping CONUS

Sinn 556i Mother of Pearl - Unworn - $1700 + shipping CONUS

Sinn - 556i · $1,700
A Sinn 556i Mother of Pearl watch, like new and unworn.

  • Condition: Unworn
  • Status: First sale on this forum
Posted at
Dec 28, 2025, 10:10 AM
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[WTS] Sinn 556.0141 A RS

Sinn 556.0141 A RS

Sinn - 556.0141 A RS · $1,500
A Sinn 556.0141 A RS in good condition, with an uncle seiko bracelet and original rubber strap. It keeps great time.

  • Condition: Lightly used with light marks from daily use
  • Bracelet type: Uncle Seiko bracelet
  • Strap count: 2
  • Includes: Rubber strap and original rubber strap
Posted at
Dec 27, 2025, 3:25 PM
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