Modello Quattro U4S-BRZ-SI
Collab - Time Only
Hand engraved dial
Bronze slim case
Black Cordovan shell leather strap
Ref. UWK-U4S-BRZ-SI
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Buy Now, Pay Later. 3 payments at 0% interest.
Estimated shipping within 2/4 business days.
You may return the product within 14 days.
24 months warranty.
Description Discover more
A three-way collaboration, and a
pièce unique
, U4S-BRZ-SI was conceived and created to celebrate Swiss history and to benefit New York City’s Swiss Institute. The UNIMATIC x King Nerd x Massena LAB U4S-BRZ-SI is a self-winding wristwatch with a bronze case (UNIMATIC’s first ever use of bronze) and a bronze, galvanic-coated and hand-engraved dial by the artist King Nerd.
The U4S-BRZ-SI commemorates the story of William Tell, the Swiss folk hero thought to be the originator of the Swiss Confederation. According to legend, William Tell was a famed 14th-century outdoorsman and marksman. When he, quite literally, refused to bow to the Austrian dominion of his Swiss canton, both he and his young son were arrested and sentenced to death. Before the planned execution, in a cruel plot to punish and humiliate Tell even further, Tell was offered a chance at freedom. If, and only if, Tell could, in one attempt, shoot an arrow through an apple placed on top of his blindfolded son’s head, he would win freedom for them both. When Tell was successful, stunning and embarrassing the Austrian authorities, he was betrayed and arrested once more, leading to a popular uprising against the Austrians and uniting the disparate cantons of Switzerland into a single confederacy.
The dial depicts three elements of the Tell legend. At the center of the dial, the apple represents not only the literal fruit from the Tell story, but also The Big Apple — New York City — home to both Massena LAB and Swiss Institute. The arrows, piercing the apple, function as the dial’s hour markers while also symbolizing precision, forward-movement, and progress. The bounds of ribbon, the loose blindfold of Tell’s rescued son, are a symbol of freedom, liberation, and the opposite of blindness: vision, wisdom, and knowledge.
Generously donated by UNIMATIC and Massena LAB, the watch is being sold to benefit the missions of Swiss Institute.
The buyer of this lot may be eligible to receive a charitable tax deduction for their purchase. Please see section 10 of this Auction’s Conditions of Sale.
300m = 1000ft = 30atm WR
Diameter 40mm case
2.8mm thick flat sapphire
Anti-reflective coating on lens inner-side
CuSn8 Bronze b
rushed finish
Galvanic black dial
Fully hand engraved dial
Automatic calibre Sellita SW200-1 28,800bph
Hacking seconds hand
Self-winding/ manual winding
Accuracy +/- 12 sec/day up to +/-30 sec/day
38h power reserve
Anti-magnetic ≥4800 A / m
Black Cordovan shell leather strap
Unimatic tough case, warranty card with unique ID seal
DOWNLOAD SPECS
Movement
Automatic calibre Sellita SW200-1 28,800bph
Hacking seconds hand
Self-winding/ manual winding
Accuracy +/- 12 sec/day up to +/-30 sec/day
38h power reserve
Anti-magnetic ≥4800 A / m
Case
Diameter 40mm case
Anti-reflective coating on lens inner-side
CuSn8 Bronze brushed finish
Dial
Galvanic black dial
Fully hand engraved dial
Durability & Protection
300m = 1000ft = 30atm WR
2.8mm thick flat sapphire
Design
Unimatic tough case, warranty card with unique ID seal
Watch Kit
Black Cordovan shell leather strap
FAQ Frequently Asked Questions
What is the difference between the Automatic, Quartz and Meca-Quartz movements?
Automatic movements are powered by the motion of your wrist and prized for their craftsmanship. Quartz movements run on a battery for maximum precision and low maintenance. Meca-Quartz pairs a quartz base with a mechanical chronograph module, combining accuracy with a mechanical feel.
Are UNIMATIC watches truly professional diver tools?
Yes. Every diver is water resistant to 300m, individually pressure-tested, and built around a screw-down caseback and crown with a mono-directional safety bezel, fully rated for professional diving.
Why is every UNIMATIC watch individually numbered?
Each piece is produced in a strictly limited edition and numbered by hand on the caseback, guaranteeing its authenticity and its place within the series.
How durable are UNIMATIC watches for daily wear?
The 316L stainless steel case, double-domed sapphire crystal with anti-reflective coating and 360° protection system are engineered to take daily knocks in stride, from the desk to the water.
What kind of lume is used for low-light visibility?
Hands and indices are treated (unless stated) with Super-LumiNova® colours picked to match the design details, delivering a strong, long-lasting glow for clear legibility in low-light and underwater conditions. It is not radioactive and requires exposure to light (natural or artificial) to charge.
How can I find out the lug width on my UNIMATIC watch
All UNIMATIC watches have a lug width of 22mm.
What is the size of the strap?
All our straps are designed to fit our watches, which use 22 mm wide straps.
They are available in one size only.
To check whether the strap will fit your wrist, please refer to the size information in the product page.
Are UNIMATIC watches water resistant?
All UNIMATIC cases are engineered to provide exceptional water resistance. Every UNIMATIC watch is individually tested to ensure a minimum water resistance of 300m (30 ATM), while selected on case modello 1 featuring our enhanced case construction are tested to withstand 600m (60 ATM).
Before exposing your watch to water, always make sure the crown and, where applicable, the pushers are fully screwed down and securely tightened. Never operate the crown or pushers while the watch is underwater.
After use in seawater, rinse the watch thoroughly with fresh water and dry it completely.Please refer to your specific model's technical specifications to confirm its certified water resistance rating.
What is an automatic watch?
The UNIMATIC automatic watch is a self-winding mechanical timepiece powered not by a battery, but by the natural kinetic energy generated from the wearer’s arm movements.
Automatic watches are more sensitive to factors like temperature fluctuations, impacts, and how they are worn.
Consequently, they may not run as precisely as quartz watches, and any timekeeping variations depend on the specific movement type.
Based on experience, new mechanical watches may initially show slight time inaccuracies, which generally self-regulate over time.
What is a reference number?
A reference number is an alphanumeric code associated with each watch model (e.g., U1S-T-MP).
You can find the reference number in the documents provided at the time of purchase, such as the International Warranty certificate, or on the case-back of your watch.
Does the stainless steel bracelet fit my watch?
The UNIMATIC UBR-TLQ18 solid stainless steel bracelet is compatible with almost all the UNIMATIC lineup. Above is a chart to help you choose the correct end-link variation for your watch. Please note that the bracelet is available in two different finishes: Brushed and Sandblasted. While a bracelet may be mechanically compatible with your watch in terms of fit and attachment, it may not match the watch aesthetically if the finish is different.
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