DOXA SUB 300 CarbonvsUnimatic Modello Quattro
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Measurements
Catalog photos are all shot at the same flattering size. These aren't: every case below shares one millimeter scale.

SUB 300 Carbon

Modello Quattro
Diameter
42.5mm
40mm
Water Resistance
300m
300m
Power Reserve
38h
38h
MSRP
$4,390
$1,280
lowest
Movement
Automatic
Sellita SW200-1
Case
2 specsCrystal & Dial
4 specsMovement
1 specsPricing
1 specsReviews
Synthesized for each watch independently from owner discussions, enthusiast forums, written reviews, and video reviewers.
The DOXA SUB 300 Carbon is widely praised for its exceptionally lightweight forged carbon case, offering superior comfort and a unique texture, with reviewers calling it a "tactical featherweight." Owners and reviewers alike highlight its vintage dive watch aesthetic, vibrant dial options, and satisfyingly clicky bezel. The COSC-certified automatic movement is noted for reliable timekeeping, with accuracy reported between +0.9 and +5 seconds per day. Some sources mention a 38-hour power reserve as a trade-off for its slimness. The integrated rubber strap is generally found comfortable and adjustable, though one reviewer noted sharp edges on the clasp and another that the strap requires cutting to size. The bezel's no-decompression markings are flagged as potentially outdated for modern diving. Overall, owners and reviewers rate the DOXA SUB 300 Carbon highly for its unique lightweight construction and compelling vintage design at the price point.
Owners and reviewers praise the Unimatic Modello Quattro for its rugged tool watch aesthetic and lightweight titanium case, with one model weighing just 65 grams. The watch is noted for its striking color combinations and good daylight legibility, and its build quality is considered excellent, offering a stylish and robust character. However, legibility is reduced in the dark, and one owner found the included strap required effort to tighten, suggesting a potential swap for a more pliable option. The Sellita SW200-1b movement has a stated accuracy of ±12 seconds per day, while a different variant's Seiko NH34A movement is rated at -20/+40 seconds per day. On balance, owners and reviewers appreciate the Unimatic Modello Quattro for its lightweight titanium construction and appealing design at its price point.
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