Modello Quattro U4-BLB
Limited Edition - Time Only
770€
Tax & duties included
Automatic calber NH35A with a hacking seconds
Limited edition of 99 pieces, individually numbered
Date window at 6 o'clock
300m water resistant, built for performance
Ref. UWK-U4-BLB
This product is sold out
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
The Modello Quattro ref. U4-BLB is a Made in Italy military watch designed for maximum legibility and durability. It features a matte black sandwich dial with long indices revealing Super-LumiNova® BG W9 lume, providing excellent visibility in all light conditions.
Time is displayed through Super-LumiNova® minimal phantom hands and a reverse lollipop second hand with luminous tip. The thick flat anti-reflective sapphire crystal guarantees optimal readability in any environment.
The brushed black DLC stainless steel case, screw-down caseback, 8mm crown, and high-quality gaskets ensure water resistance individually tested to 30 atm = 300m = 1000ft.
Precision is powered by the NH35A automatic movement, tuned to 21,600 bph, with 41-hour power reserve and hacking seconds hand.
The U4-BLB comes on a black nylon NATO strap with black DLC brushed stainless steel hardware signed UNIMATIC. The caseback features an Index engraving and the individual progressive number, making each watch unique.
Covered by a 24-month worldwide warranty, the Modello Quattro U4-BLB is part of a limited edition of 99 pieces, combining stealth aesthetics, tactical reliability, and Italian craftsmanship.
Movement
Automatic caliber NH35A 21600BPH
Hacking seconds hand
Bi-directional automatic winding + handwinding
Accuracy -20~+40s/ day
More than 41h power reserve
Case
Diameter 40mm
Fixed monoblock bezel
316 stainless steel case
Black DLC brushed finish
Dial
Matte black long index sandwich dial
Super-LumiNova® BG W9
Matte white dial trims
Super-LumiNova® minimal phantom H+M, matte black reverse lollipop S with Super-LumiNova® tip
DURABILITY & PROTECTION
300m ≈ 1000ft ≈30atm WR Individually tested
2.8mm thick flat sapphire
Inner side anti-reflective coating
Design
Iconic Modello Quattro case design
Individually numbered, edition of 99
WATCH KIT
Black heavy duty nylon NATO strap
Black DLC stainless steel brushed hardware signed UNIMATIC
UNIMATIC tough case, warranty card with unique ID seal
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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