The Sinn 556 has become one of our best selling watches of all time and for good reason - it offers a great mix of performance, durability and classic Sinn design.
This version of the Sinn 556 is marked "A" for Arabic numbers.
Sinn's inspiration for the design of this watch is the historic Sinn NaBo clocks long manufactured for use in cockpits as a navigational tool. Even today Sinn continues to produce these clocks which are used in both civilian and military aircraft, as well as specialty cars.
We think this watch is one of the most legible that we carry.
The four anchor numerals on the quarter hours provide positioning for a quick read of the time.
And the bold indices and hands play well against the matte black dial providing excellent contrast. There is a good reason that this design has worked so well in cockpits around the world.
The Sinn 556 A features a case size at 38.5 mm which is satinized. This finish results in a slightly more polished look while at the same time retaining some characteristics of a matte finish.
Notable features of the Sinn 556 A include:
- Case in 316L surgical stainless steel
- Sapphire crystals on both sides of the watch
- Double coated anti-reflective covering
- Dual seal crown lock to improve water resistance
- Sapphire crystal back to view the decorated movement
- Top Grade (chronometer level) movement
This watch is fitted with a Sinn stainless steel H-link bracelet with locking clasp.
And what is very unusual for watch in this category is that Sinn has been able to engineer a water resistance of 200 meters rather than the traditional 50 to 100 meters in competing watches.