Side by side

Christopher Ward C63 True GMTvsSinn U18

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

C63 True GMT
Christopher WardC63 True GMT
MSRP $4,135
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 True GMT

The Christopher Ward C63 True GMT is widely praised for its in-house CW-002 caliber, which offers a 120-hour power reserve and COSC certification. Owners find the 39mm case size comfortable, though some note it wears closer to 40-41mm. While the PVD hands provide good contrast and the lume is praised for readability, one owner felt the orange accent lacked pop and the gloss dial/text combo appeared cheap in certain lighting. One owner also noted a perceived slight difference in production quality compared to a sibling model's bracelet. Overall, owners and reviewers rate the Christopher Ward C63 True GMT highly for its impressive power reserve and COSC-certified movement at its price point.

From video reviewers

The case finishing is praised for its polished and curved surfaces. The watch uses a Sellita SW330-2 movement. Reviewers disagree on the case size, with one noting 40.5mm and another highlighting a 36mm option.

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

18 of 29 specs differ
Diameter
C63 True GMT48mm
U1844mm
Power Reserve
C63 True GMT120h
U1842h
Water Resistance
C63 True GMT100m
U182,000m
MSRP
C63 True GMT$4,135
U18$3,488

Full specifications

Case

8 specs
Category
GMT
Diver
Diameter
48mm
44mm
Thickness
14.15mm
15.5mm
Lug-to-Lug
48mm
Material
Stainless Steel
high-strength
Finish
Brushed + Polished + Sandblasted
Water Resistance
100m
2000m
Caseback
Solid

Crystal & Dial

4 specs
Crystal Shape
Flat
AR Coating
Inner
Indices
Applied
Lume
SLN X1 BL C1
None

Movement

5 specs
Caliber
CW-002
Sellita SW300-1
Beat Rate
4 vph
28,800 vph
Power Reserve
120h
42h
Jewels
33
25
Complications
GMT, Moonphase, Day-date, Small seconds
None

Pricing

1 specs
MSRP
$4,135
$3,488
Keep exploring

More watches worth a look

Matched to the watches above on size, movement, style and price — microbrands first. Open any one to dig in.

Follow this matchup

Get a note when Christopher Ward C63 True GMT vs Sinn U18 gets more votes, a community discussion, or a price drop. No account needed.

Adjacent matchups

People also compared

Comparisons nearby in the catalog — alternatives to the watches above paired against the matchup.