Modello Quattro U4-A
Limited Edition - Time Only
520€
Tax & duties included
Made in Italy military watch
40mm case diameter
Comes in the shockproof two-slots UNIMATIC tough Case
Ref. UWK-U4-A
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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
Modello Quattro ref. U4-A is the Made in Italy military watch. It features a vintage black dial with markers in Super-LumiNova® C3 pale green lume and an off-white second rail and dial trims.
Time is indicated thanks to matching phantom ladder hands set and the vintage black reverse lollipop second hand with off-white tip. The 2.8mm thick flat sapphire crystal is treated with an anti-reflective coating.
The solid 316 brushed stainless steel case, the screwed-in 2.2 mm thick caseback, the 8mm diameter crown together with the high quality gaskets set provide a water resistance tested individually to 30 atm=300m=1000ft.
Timing accuracy is guaranteed by the NH35A automatic movement tuned to 21600bph with 41h power reserve and hacking second hand, fitted with a metal movement holder. It comes on an olive drab heavy-duty Unimatic nylon nato strap with stainless steel brushed hardware signed Unimatic, that fits in the 22mm drilled lugs.
The caseback features the Unimatic "Ground-to-Air Signals” engraving and the individual progressive number. The watch is covered by a 24 months worldwide warranty, first batch of 500 pieces.
300m = 1000ft = 30atm WR
Diameter 40mm case
Drilled lugs / 22mm
Fixed monoblock bezel
2.8mm thick flat sapphire
Anti-reflective coating on lens inner-side
316 stainless steel case brushed finish
Vintage black dial
Super-LumiNova® C3 pale green
Off-white second rail and dial trims
Automatic calibre Seiko NH35A 21600bph
Hacking seconds hand bi-directional winding
Accuracy -20/+40 s/day – 41h power reserve
Antimagnetic ≥4800 A / m
Olive drab heavy-duty Unimatic nylon nato strap
Stainless steel brushed hardware signed Unimatic
Unimatic "Ground-to-Air Signals” caseback
Unimatic tough case, warranty card with unique ID seal
DOWNLOAD SPECS
Movement
Automatic calibre Seiko NH35A 21600bph
Hacking seconds hand bi-directional winding
Accuracy -20/+40 s/day – 41h power reserve
Antimagnetic ≥4800 A / m
Case
Diameter 40mm case
Drilled lugs / 22mm
Fixed monoblock bezel
Anti-reflective coating on lens inner-side
316 stainless steel case brushed finish
Unimatic "Ground-to-Air Signals” caseback
Dial
Vintage black dial
Super-LumiNova® C3 pale green
Off-white second rail and dial trims
Durability & Protection
300m = 1000ft = 30atm WR
2.8mm thick flat sapphire
Design
Unimatic tough case, warranty card with unique ID seal
Watch Kit
Olive drab heavy-duty Unimatic nylon nato strap
Stainless steel brushed hardware signed Unimatic
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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