« Explaining the Classics »
Innovative engineering, uncompromising quality and timeless design – the Frankfurt-based heritage brand Sinn sets high standards for its timepieces. The 556 series, one of the company's most popular classics, is an attractive entry-level model with excellent value for money. But can this minimalist wristwatch keep up with its more extensively equipped siblings in terms of quality and technology? We take a closer look at the Sinn 556I and 556A and share our experience with these watches.
Manufacture Quality for Under Four Figures
Elegant dress watch or everyday all-rounder? When you first encounter the 556, pinning it down to one category isn't all that easy.
This much is certain: the series belongs to Sinn's broader group of Instrument Watches, which also includes other successful models such as the 104 and the 240.
While the features of the two lines vary considerably by comparison, all the watches we tested score with easy legibility and a rugged presence. Distinct from the Instrument Watches are Sinn's Instrument Chronographs, which form a separate family and feature the popular stopwatch function. A look across the Frankfurt brand's product portfolio reveals impressive technologies: whether it's TEGIMENT technology for increased case durability or Ar-Dehumidifying Technology for improved functional reliability – there seems to be a perfect solution for every problem.
Yet the 556 in our review has none of these innovations. Does that make it a lazy compromise, a bargain at the expense of functionality? Not at all! Instead of showing off with extra features, it focuses on the essentials – and what remains is the essence of a timeless watch. We're happy to explain why.
Special Watches for Every Day
Beyond the series' qualitative strengths, its value for money deserves special mention. For under €1,000, the 556I and 556A we tested offer a satin-finished stainless steel case whose look and feel speak of the upper mid-range rather than the entry level. Fitted with sapphire crystal on both sides, the watches feature a striking display caseback that reveals the reliable, proven ETA caliber. Shock resistance and antimagnetic properties are ensured in accordance with DIN ISO 1413 and DIN 8309.
Water resistance to 20 bar and the discreet date display round out the picture of a versatile all-rounder.
Unlike other multitalents, however, the 556 shows off its toughness only with restraint. Its design is defined not by muscular details but by elegant curves and a comfortable 38.5 mm diameter. Only a few deliberately understated engravings on the caseback hint at the engineering inside. In our experience, this especially appeals to business professionals.
This lets us answer the initial question of how to categorize the model: the 556 is an everyday all-rounder dressed as a dress watch. There is simply no situation in which this watch looks out of place.
Subtle Details Set the Versions Apart
A single glance at the dial is enough to tell the Sinn 556A from the 556I. While the 556A's look is dominated by its bold numerals at 3, 6, 9 and 12 o'clock, the 556I seems almost shy with its understated markers. The 556A's date display even had to move down to make room for the large "3."
Apart from these differences, the versions are visually and technically identical. Accordingly, there are no differences in strap choice either. You can choose from numerous alligator and calfskin straps, optionally with refreshing contrast stitching. If you prefer metal, in our experience you'll opt for a fine-link or two-link bracelet at extra cost. The silicone straps, also available at extra cost, have a particularly sporty look and proved noticeably well made in our review.
Only recently has the model family welcomed some colorful additions, as the 556I is now available in various versions. Alongside the classic black, there are two dials with a galvanized finish that shimmer in either deep blue or refined mocha brown. And if you like something out of the ordinary, you can choose one of the mother-of-pearl editions.
Characterful, Advanced and "Made in Germany"
Whether Rolex, Omega or Breitling: choosing one of these luxury brands comes with the assurance of buying top quality and longevity along with excellent prestige. You don't need to be an expert in horology to know that. But what about Sinn? What does the German brand, founded almost 60 years ago by its namesake, stand for? Here's our quality check:
Read the company's full name and the term "Spezialuhren" (special watches) catches your eye. It reveals that the Frankfurt manufacture focuses on developing problem-solving innovations. In 2001, for example, it introduced the so-called DIAPAL technology, which is characterized by a lubricant-free lever escapement. Instead of oil, it uses special material pairings that interact without friction. Solutions for increased temperature resistance, outstanding resistance to magnetic fields and maximum case durability are just a few examples of other technologies with which Sinn has enriched the watch world.
The Sinn 556I and 556A are part of this development work and, just like the Instrument Chronographs and other models, stand for technical perfection, functionality and timeless design. In our review, neither version revealed any weaknesses or noticeable differences.
Given these qualities and a comparatively moderate price, it's hardly surprising that the 556I and 556A rank among the brand's most popular masterpieces.
Who Is the 556 Right For?
Based on our review, both the Sinn 556A and the 556I rank among the most versatile wristwatches in the €1,000 price range. If you place particular value on clear legibility, classic shapes and durable construction, it's exactly the right choice. It's also brilliantly suited as a "one-watch collection" if you're looking for a companion for every occasion. However, if you value an exciting, unusual design or multiple functions, you probably won't be happy with the pared-down design of the 556. If you're after a minimalist look combined with maximum quality, our review experience suggests you'll be all the happier.
