40mmAutomatic

Modello Quattro U4-GMT-AEB
Limited Edition - GMT

795€ Tax & duties included

Professional Made in Italy GMT military watch

Japanese automatic watch

Two seatbelt nylon NATO straps included

Ref. UWK-U4-GMT-AEB
Colors: Black

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Estimated shipping within 2/4 business days.

You may return the product within 14 days.

24 months warranty.

Description Discover more

The UNIMATIC Modello Quattro U4-GMT-AEB is a limited-edition automatic GMT military watch designed for reliable everyday performance. Made in Italy, this 300m water-resistant GMT watch features a 40mm brushed 316 stainless steel case with a fixed monoblock bezel. The functional matte black dial features Super-LumiNova® C1, with subtle debossed open seconds rail and dial trims for enhanced legibility. Built for demanding conditions, the 30atm GMT watch is equipped with a 2.8mm thick flat sapphire crystal with a 24-hour scale printed in Super-LumiNova® C1 and inner-side anti-reflective coating, along with a distinctive “wrinkled” caseback. Powered by the automatic NH34A movement, it features a dedicated GMT function, hacking seconds, self-winding and manual winding, with more than 41 hours of power reserve. The UNIMATIC U4-GMT-AEB comes fitted with a black seatbelt NATO strap and includes an additional olive drab seatbelt NATO strap. Limited to 250 individually numbered pieces worldwide, this automatic GMT military watch is delivered in a UNIMATIC tough case with a warranty card featuring a unique ID seal.

Movement

Automatic caliber NH34A 21600BPH

Hacking seconds hand

GMT function

Self-winding/ manual winding

Accuracy -20~+40s/ day

More than 41h power reserve

Case

Diameter 40mm

Fixed monoblock bezel

316 stainless steel case brushed finish

Dial

Matte black dial

Super-LumiNova® C1

Debossed open second rail and dial trims

Durability & protection

300m ≈ 1000ft ≈ 30atm WR Individually tested

2.8mm thick flat sapphire with 24-hour scale printed in Super-LumiNova® C1

Inner side anti-reflective coating

“Wrinkled” caseback

Design

Modello Quattro case design

Individually numbered, edition of 250

What's included

Black seatbelt NATO strap

EXTRA olive drab seatbelt NATO strap

UNIMATIC tough case, warranty card with unique ID seal

Impronte collection

limited edition

Edition of 250

individually numbered

Hacking seconds hands

GMT function

Automatic

movement

40mm

case diameter

300m

water resistant

Matte black

dial

24 Months

worldwide warranty

Time through crystal
Black, in relief

Time through crystal

The 24-hour GMT scale is printed directly onto the sapphire crystal in Super-LumiNova® C1. Positioned on the crystal itself, the indication preserves the clarity of the dial while adding a second time zone.
A functional detail made visible through light.

Black, in relief

The AEB execution features a matte black dial, allowing the Impronte details to emerge through subtle shifts in light and shadow. A debossed open seconds rail and recessed trims create depth while preserving the U4’s restrained, utilitarian character.

FAQ Frequently Asked Questions

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.

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.

What they say about us

Modello Quattro U4-GMT-AEB
Limited Edition - GMT