IWC Schaffhausen Aquatimer AutomaticvsFormex Reef 39.5 mm

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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.

Aquatimer Automatic

Reef 39.5 mm
Diameter
42mm
39.5mm
Lug-to-Lug
n/a
45.5mm
Thickness
14.1mm
11mm
lowest
Water Resistance
300m
300m
Power Reserve
120h
highest
56h
MSRP
$6,700
$2,230
lowest
Movement
32111
Sellita SW300-1
Case
4 specsCrystal & Dial
2 specsMovement
6 specsPricing
1 specsReviews
Synthesized for each watch independently from owner discussions, enthusiast forums, written reviews, and video reviewers.
Owners widely praise the IWC Schaffhausen Iw328801 Aquatimer Automatic as a beautiful, solid, and hard-wearing watch with great lume and a unique, functional bezel. Some owners find the 42mm case chunky and note that non-removable bars limit strap options, while one reviewer suggests the utilitarian and angular look, combined with a non-tapering bracelet and substantial weight, indicates a need for refinement. The movement is an automatic 32111 caliber with a 120-hour power reserve. On balance, owners and reviewers rate the IWC Schaffhausen Iw328801 Aquatimer Automatic well for its robust build and functional bezel system.
The Formex Reef 39.5 mm is widely praised for its refined finishing, improved proportions, and compelling value under €2,000. Owners and reviewers highlight its comfortable wearability on smaller wrists, unique aesthetic, and impressive specifications including 300m water resistance and a COSC-certified Sellita SW300-1 movement. Some note the 22mm lug width feels slightly disproportionate and the bracelet could benefit from more taper. A prototype crown protrusion issue is expected to be resolved in production. Overall, owners rate the Formex Reef 39.5 mm highly for its excellent build quality and tool-like features at its price point.
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