Side by side

Christopher Ward C63 Sealander Extreme GMTvsSinn U18

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

C63 Sealander Extreme GMT
Christopher WardC63 Sealander Extreme GMT
MSRP $2,075
U18
SinnU18
MSRP $3,488
What people say

Owners + reviewers, side by side

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

Christopher Ward C63 Sealander Extreme GMT

The Christopher Ward C63 Sealander Extreme GMT is widely praised as a competent and comfortable tool watch offering excellent value. Reviewers consistently highlight its impressive Globolight lume, providing excellent legibility, and its well-proportioned 41mm brushed steel case. The Sellita SW330-2 movement is noted as reliable, though its standard accuracy is stated as ±20 seconds per day, and its GMT functionality is considered less advanced than some alternatives. One owner notes the green dial can be an acquired taste, and hands and markers are considered less refined than those on significantly more expensive watches. The Christopher Ward C63 Sealander Extreme GMT is priced attractively at €1,895 on bracelet. Overall, owners and reviewers highly regard the Christopher Ward C63 Sealander Extreme GMT for its rugged, travel-ready design and impressive lume at its price point.

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
C63 Sealander Extreme GMT40mm
U1844mm
Power Reserve
C63 Sealander Extreme GMT56h
U1842h
Water Resistance
C63 Sealander Extreme GMT150m
U182,000m
MSRP
C63 Sealander Extreme GMT$2,075
U18$3,488

Full specifications

Case

8 specs
Category
GMT
Diver
Diameter
40mm
44mm
Thickness
12.05mm
15.5mm
Lug-to-Lug
48mm
Material
Stainless Steel
high-strength
Finish
Brushed and polished
Water Resistance
150m
2000m
Caseback
Solid

Crystal & Dial

4 specs
Crystal Shape
Flat
AR Coating
Inner
Indices
Applied
Lume
SLN X1 BL / GL
None

Movement

4 specs
Caliber
SW330-2
SW300-1
Beat Rate
4 vph
28,800 vph
Power Reserve
56h
42h
Complications
GMT
None

Pricing

1 specs
MSRP
$2,075
$3,488
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