Side by side

IWC Schaffhausen Iw328801 Aquatimer AutomaticvsSinn U18

The numbers, the dial colors, the calibers — laid out so you can stop flipping between tabs.

What people say

Owners + reviewers, side by side

Synthesized for each watch independently from owner discussions, enthusiast forums, written reviews, and video reviewers.

IWC Schaffhausen Iw328801 Aquatimer Automatic

Owners widely praise the IWC Schaffhausen Iw328801 Aquatimer Automatic as a beautiful, solid, and hard-wearing watch with great lume and a functional bezel. Some owners find it chunky and note that the non-removable bars limit strap options, while one reviewer suggests its utilitarian and angular look, combined with a non-tapering bracelet and substantial weight, indicates a need for evolutionary refinement. The 42mm case feels robust and over-engineered, featuring a unique SafeDive bezel system. The IWC 32111 automatic movement offers a 120-hour power reserve. On balance, owners and reviewers rate the IWC Schaffhausen Iw328801 Aquatimer Automatic well for its robust build and unique bezel system, despite some finding it chunky.

Sinn U18

The Sinn U18 is praised for its unique deep blue/green dial with three-dimensional oxygen bubbles that change with light, and its comfortable, easily adjustable bracelet. Owners find the watch stunning and a piece of history, appreciating the refined hands. The Sinn U18 features a 44mm, 15.5mm thick case made from German submarine steel, offering a 2000-meter dive specification and Sinn's Ar-Dehumidifying technology, powered by a Sellita SW300-1 movement. The case thickness is apparent, and the watch comes as a complete set with box and papers for $3,000-$3,680. On balance, owners and reviewers rate the Sinn U18 highly for its striking dial and robust build.

At a glance

17 of 29 specs differ
Diameter
Iw328801 Aquatimer Automatic42mm
U1844mm
Power Reserve
Iw328801 Aquatimer Automatic120h
U1842h
Water Resistance
Iw328801 Aquatimer Automatic300m
U182,000m
MSRP
Iw328801 Aquatimer Automatic$6,700
U18$3,488

Full specifications

Case

6 specs
Diameter
42mm
44mm
Thickness
14.1mm
15.5mm
Material
Stainless Steel
high-strength
Finish
Steel
Water Resistance
300m
2000m
Caseback

Crystal & Dial

5 specs
Crystal
Sapphire
Crystal Shape
AR Coating
Dial Color
Blue
Black
Indices

Movement

5 specs
Caliber
32111
Sellita SW300-1
Power Reserve
120h
42h
Jewels
21
25
Hacking
Yes
No
Hand-winding
Yes
No

Pricing

1 specs
MSRP
$6,700
$3,488
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