
Modello Quattro U4-AEB Limited Edition - Time Only
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- Professional Made in Italy military watch
- Automatic Movement
- Two seatbelt NATO nylon straps included
In stock
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.
Designed and Made in Italy







Specs
The UNIMATIC Modello Quattro U4-AEB is a limited-edition automatic military watch designed for reliable everyday performance. Made in Italy, this 300m water-resistant military 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, paired with matching hands for enhanced legibility. Built for demanding conditions, the 30atm watch is equipped with a 2.8mm thick flat sapphire crystal with inner-side anti-reflective coating and a distinctive “wrinkled” caseback. Powered by the automatic NH35A movement, it features hacking seconds, bi-directional automatic winding and handwinding, with more than 41 hours of power reserve. The UNIMATIC U4-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 military watch is delivered in a UNIMATIC tough case with a warranty card featuring a unique ID seal.
- Automatic caliber NH35A 21600BPH
- Hacking seconds hand
- Bi-directional automatic winding + handwinding
- Accuracy -20~+40s/ day
- More than 41h power reserve
- Diameter 40mm
- Fixed monoblock bezel
- 316 stainless steel case brushed finish
- Matte black dial
- Super-LumiNova® C1
- Debossed open second rail and dial trims
- 300m ≈ 1000ft ≈ 30atm WR Individually tested
- 2.8mm thick flat sapphire
- Inner side anti-reflective coating
- “Wrinkled” caseback
- Modello Quattro case design
- Individually numbered, edition of 250
- Black seatbelt NATO strap
- EXTRA olive drab seatbelt NATO strap
- UNIMATIC tough case, warranty card with unique ID seal
Focus

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.
Gallery
Detailed views from every angle.

What they say about us
“UNIMATIC has been able to generate this flagship appeal that goes beyond the look of their watches. The brand name has weight to it now.”
HODINKEE
“Very professional and serious, clean-designed tool watches.”
THE NEW YORK TIMES
“UNIMATIC captures an experience, and they do so quite effectively.”
WORN & WOUND
“UNIMATIC effectively gives you what you want and need without overdoing it.”
A BLOG TO WATCH
“UNIMATIC's Giovanni Moro and Simone Nunziato have a fantastic eye for design... they've created a unique and memorable timepiece heritage for the long”
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Frequently asked questions
We choose each movement to match the unique character of the watch. Our Automatic models - typically powered by the NH35A or the SW200-1 - are driven by the natural motion of your wrist, honoring the heritage of traditional watchmaking. Meanwhile, our Toolwatch Series features high-precision, battery-powered calibers paired with our proprietary protection system, designed to withstand impacts and drops. For our chronograph models, we selected the VK31 movement: the current market offers very few automatic chronograph movements that combine reliability with accessible pricing, making this caliber the most dependable and practical choice for our purpose-built watches. A meca-quartz movement is a hybrid movement that combines quartz timekeeping with mechanical chronograph components.
Absolutely. Every UNIMATIC diver is water-resistant to 300 m (1000 ft) and individually tested to ensure perfect seal integrity. Each piece features a heavy-duty screw-down caseback, a screw-down crown with high-quality gaskets, and a 120-click mono-directional bezel, meeting and often exceeding professional diving standards.
The only precaution required before entering the water is to ensure the crown is fully screwed down, guaranteeing the watch maintains its complete water-resistant performance.
Whether it belongs to a limited edition or our permanent line, every UNIMATIC watch is individually numbered on the caseback. This unique ID serves as a mark of authenticity and craftsmanship, ensuring that your specific timepiece is one-of-a-kind. For limited runs, it marks its place in a finite series; for our core collection, it highlights our commitment to quality limiting it to a yearly production batch. Exclusivity is a pillar of our design philosophy.
They are built as modern tough tools. We use 316L surgical-grade stainless steel for the cases and double-domed, anti-reflective Sapphire crystals, which are virtually scratch-proof. Whether you are in a boardroom or the North Sea, the watch is designed to withstand impact and harsh environments.
We use high-grade Super-LumiNova (typically C3 or BGW9) on our dials and hands. The luminous material charges from exposure to any light source and then releases a strong, long-lasting glow, ensuring reliable visibility whenever you need it.




