The Sinn 556 A is a German-engineered automatic instrument watch that combines the functional clarity of traditional aviation cockpit instruments with the refinement and versatility of a modern everyday sports watch. This 2021 example is presented in mint pre-owned condition, featuring the distinctive matte black dial, highly legible Arabic numerals, and beautifully satinized stainless steel case.
Designed and manufactured by Sinn Spezialuhren in Frankfurt am Main, Germany, the 556 A embodies the brand’s philosophy of prioritizing functionality, durability, and exceptional readability. Its clean, purposeful design draws inspiration from the cockpit clocks and navigation instruments traditionally used in aviation.
The defining characteristic of the 556 A is its matte black dial with prominent Arabic numerals at 3, 6, 9, and 12 o’clock, complemented by luminous hour markers and hands. Unlike the glossy black dial of the 556 I, the matte finish gives the 556 A a more traditional instrument-watch appearance while reducing distracting reflections.
The watch is housed in a 38.5mm satinized stainless steel case, measuring just 11mm thick. These compact proportions provide excellent everyday comfort while maintaining the substantial build quality associated with Sinn’s professional instrument watches.
Protecting the dial is a sapphire crystal with anti-reflective treatment on both sides, providing excellent scratch resistance and outstanding clarity. A second sapphire crystal on the exhibition caseback allows the mechanical movement to be viewed from the rear.
Powering the 556 A is the Swiss Sellita SW200-1 automatic movement, featuring 26 jewels, a frequency of 28,800 vibrations per hour, and approximately 38 hours of power reserve. The movement includes hacking seconds for precise time setting and a date complication positioned discreetly between 4 and 5 o’clock.
Despite its elegant and understated appearance, the Sinn 556 A offers impressive technical specifications, including 200 meters of water resistance, a screw-down crown, resistance to low pressure, and anti-magnetic performance in accordance with DIN 8309.
Specifications
Case
- Satinized Stainless Steel
- 38.5mm Case Diameter
- Approximately 11mm Case Thickness
- 20mm Lug Width
- Satin-Brushed Instrument-Watch Finishing
- Screw-Down Crown
- Screw-Fastened Caseback
- Sapphire Crystal Exhibition Caseback
- Water Resistance: 200 Meters / 660 Feet / 20 Bar
- Low-Pressure Resistant
- Designed and Engineered in Germany
Dial
- Matte Black Dial
- Distinctive Arabic Numerals at 3, 6, 9, and 12
- High-Contrast White Markings
- Luminous Hour Markers
- Luminous Hour and Minute Hands
- Central Seconds Hand
- Date Display Between 4 and 5 O’Clock
- Aviation Instrument-Inspired Design
- Excellent At-a-Glance Readability
Crystal
- Scratch-Resistant Sapphire Crystal
- Anti-Reflective Coating on Both Sides
- Designed for Excellent Visibility
- Sapphire Exhibition Caseback
- Anti-Reflective Treatment on the Interior of the Caseback Crystal
Movement
- Sellita SW200-1
- Swiss Automatic Mechanical Movement
- 26 Jewels
- 28,800 Vibrations Per Hour / 4Hz
- Approximately 38-Hour Power Reserve
- Self-Winding
- Manual Winding Capability
- Hacking Seconds
- Central Hours, Minutes and Seconds
- Date Complication
- Swiss Mechanical Movement
Technical Features
- Water-Resistant and Pressure-Resistant to 20 Bar
- Meets the Technical Requirements of DIN 8310
- Anti-Magnetic in Accordance with DIN 8309
- Low-Pressure Resistant
- Screw-Down Crown
- Screw-Fastened Exhibition Caseback
- Sapphire Crystal Front and Back
Features
- German Instrument-Watch Design
- Swiss Automatic Mechanical Movement
- Sellita SW200-1 Caliber
- Approximately 38-Hour Power Reserve
- Matte Black Dial
- Arabic 3-6-9-12 Numeral Layout
- Luminous Hands and Hour Markers
- Sapphire Crystal with Double-Sided AR Treatment
- Sapphire Exhibition Caseback
- Screw-Down Crown
- Date Complication
- DIN 8309 Anti-Magnetic Compliance
- DIN 8310 Water-Resistance Compliance
- Low-Pressure Resistance
- 200M / 20 Bar Water Resistance
- Compact 38.5mm Case
- Satinized Stainless Steel Construction
Additional Information
- Brand: Sinn Spezialuhren
- Collection: Instrument Watches
- Model: 556 A
- Reference: 556.014
- Year: 2021
- Dial: Matte Black
- Dial Markers: Arabic Numerals and Luminous Indices
- Case Material: Satinized Stainless Steel
- Case Diameter: 38.5mm
- Thickness: 11mm
- Lug Width: 20mm
- Movement: Sellita SW200-1
- Movement Type: Swiss Automatic
- Jewels: 26
- Frequency: 28,800 BPH / 4Hz
- Power Reserve: Approximately 38 Hours
- Crystal: Sapphire with Double-Sided AR Treatment
- Caseback: Sapphire Exhibition
- Water Resistance: 200M / 660 Feet / 20 Bar
- Condition: Pre-Owned – Mint Condition
- Brand Origin: Germany
The Sinn 556 A has become one of the most recognizable models in the German manufacturer’s collection thanks to its timeless design, outstanding legibility, and exceptional versatility. Inspired by traditional aviation cockpit instruments, the watch prioritizes clarity and function without sacrificing the refinement expected from a premium mechanical timepiece.
The matte black dial with Arabic numerals at 3, 6, 9, and 12 gives the 556 A a distinctive personality compared with more conventional sports watches. Its clean layout and luminous markings ensure excellent readability, while the discreet date display adds everyday practicality.
The compact 38.5mm stainless steel case is another major strength. At just 11mm thick, the watch wears comfortably on a wide variety of wrist sizes and transitions easily between casual, professional, and outdoor environments.
Inside, the Sellita SW200-1 automatic movement provides a proven Swiss mechanical foundation with 26 jewels, a 28,800-vph operating frequency, and approximately 38 hours of power reserve. The sapphire exhibition caseback offers a view of the movement, adding mechanical appeal to an otherwise understated instrument-watch design.
Beyond its appearance, the 556 A incorporates several of Sinn’s practical engineering priorities, including 200-meter water resistance, DIN 8309 anti-magnetic compliance, low-pressure resistance, and a screw-down crown. These features make it a capable everyday companion rather than simply an aviation-inspired dress watch.
This 2021 example is presented in mint pre-owned condition, offering an exceptionally well-preserved example of one of Sinn’s most versatile and enduring automatic instrument watches.
Condition: Pre-owned, 2021 example in mint condition. All of our pre-owned watches are professionally cleaned before being offered for sale and checked to ensure they are functioning correctly. Please carefully review all photographs, as they form an important part of the description and show the exact cosmetic condition of the watch and everything included with the sale.
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