Manufacture History
Unimatic was founded in 2015 in Milan by Giovanni Moro and Simone Nunzi. The brand’s ethos is simple: create affordable, minimalist tool watches with a strong industrial aesthetic. They quickly gained a following for their no-logo dials, bold cushion cases, and use of reliable Japanese movements. The Modello Quattro (U4) is their flagship diver, introduced in 2017 as a refined take on the classic dive watch silhouette. It’s a direct evolution of the earlier Modello Uno, but with a more compact 40mm case and improved water resistance.
Movement
Inside the U4 beats the Seiko NH35, a workhorse automatic movement known for its reliability and ease of service. It’s a 24-jewel caliber with hacking and hand-winding, running at 21,600 vph with a 41-hour power reserve. While not COSC-certified, the NH35 is a proven performer that can be regulated to within ±10 seconds per day by a skilled watchmaker. It’s not in-house, but for a $690 watch, that’s a feature, not a bug—parts are cheap and widely available, making service costs low.
Specs
- Case diameter: 40mm
- Case thickness: 13.5mm
- Lug-to-lug: 48mm
- Case material: 316L stainless steel
- Crystal: Sapphire with double AR coating
- Water resistance: 300m (screw-down crown)
- Lume: Super-LumiNova C1 (green glow)
- Strap: 22mm NATO (nylon)
- Clasp: Pin buckle
Wrist Feel
The U4 wears surprisingly compact for a 300m diver. The 40mm case diameter and 48mm lug-to-lug mean it sits flat on most wrists, and the 13.5mm thickness is manageable under a shirt cuff. The cushion case design gives it a vintage vibe, but the weight is moderate—around 100g on a NATO. The strap is a thick, high-quality nylon that breaks in quickly, though some may prefer a rubber or steel bracelet for a more premium feel. Overall, it’s a comfortable daily wearer that doesn’t feel like a brick.
Accuracy
In real-world use, the Seiko NH35 typically runs between -10 and +20 seconds per day. With careful regulation, you can get it to within ±10 seconds. It’s not COSC territory, but for a $690 watch, it’s perfectly acceptable. The movement is robust and can handle daily knocks without losing time dramatically.
Occasions
The U4 is a true tool watch. It excels as a sport watch for swimming, hiking, or casual wear. It’s also a great daily beater thanks to its scratch-resistant sapphire crystal and comfortable NATO strap. It’s not a dress watch, but it can pull off smart-casual with a leather strap swap. For travel, the 300m water resistance and robust movement make it a reliable companion.
Wrist Presence
4/5 – The bold cushion case and high-contrast dial make it stand out without being flashy. It’s a conversation starter for those in the know, but understated enough for everyday wear.
Reference Variants
- U4-1 – Black matte dial, black NATO. The original and most common variant.
- U4-2 – Blue sunburst dial, blue NATO. Limited production, now harder to find pre-owned.
- U4-3 – White matte dial, grey NATO. Rare variant, often commands a premium.
- U4-4 – Green sunburst dial, green NATO. Special edition released in 2020.
Family References
The U4 is part of Unimatic’s Modello series, which includes the U1 (44mm), U2 (40mm chronograph), and U3 (40mm field watch). The U4 is the most popular due to its balanced proportions and dive watch functionality.
Other Notable Models by Unimatic
Unimatic also produces the Modello Cinque U5 (a 40mm GMT), Modello Sei U6 (a 40mm dress watch), and several collaborations with Hodinkee, Massena LAB, and others. The brand’s limited editions often sell out quickly and hold value well.
Similar Watches
- Seiko Prospex SPB143 – Similar 40mm diver with a more traditional design and in-house movement.
- Tudor Black Bay 58 – Higher-end alternative with a similar vintage-inspired cushion case.
- Longines HydroConquest – Entry-level Swiss diver with comparable specs and a more polished finish.
Homages
- Pagani Design PD-1661 ($120) – A budget homage to the Submariner, but lacks the U4’s unique cushion case.
- Steeldive SD1970 ($150) – A Seiko NH35-powered diver with a similar tool-watch aesthetic.
Investment Value
MSRP: $690. Current retail: $690. Pre-owned range: $500–$700. Trend: stable. The U4 is not a flipper’s dream, but it holds its value well. Buy it to wear, not to speculate. Limited editions may appreciate slightly, but don’t expect a windfall. Auction history: No major auction history. Pre-owned sales on Chrono24 and eBay typically range from $500 to $700 depending on condition and variant.
Service Interval
Every 5 years. Approximate cost: $200. Authorized only: No. Any competent watchmaker can service the Seiko NH35. Parts are widely available and inexpensive, making service costs low.
Reference Number
U4-1 (black dial) is the most common. Other references: U4-2, U4-3, U4-4.
Price Range
$500–$700. This is a low-risk entry into microbrand collecting. It’s affordable enough to buy on a whim, yet distinctive enough to stand out in a collection of Rolexes.
Pros and Cons
Pros
- Clean, minimalist design that ages well
- Robust Seiko NH35 movement with easy serviceability
- Excellent 300m water resistance for a microbrand
- Strong community following and stable resale value
Cons
- No date option (some prefer the convenience)
- NATO strap can feel cheap compared to a bracelet
- Movement accuracy is average, not COSC
- Limited availability of certain dial variants
Final Verdict
The Unimatic Modello Quattro U4 is a masterclass in less-is-more design. It delivers a genuine tool-watch experience at a price that won’t make you wince. While it won’t appreciate like a vintage Submariner, it offers something rarer: honest, unpretentious horology. If you want a watch that tells time and tells a story, the U4 is a solid buy.
