Side by side

Christopher Ward C63 Sealander GMTvsSeiko Astron

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

C63 Sealander GMT
Christopher WardC63 Sealander GMT
MSRP $1,675
Astron
SeikoAstron
MSRP $2,500

At a glance

17 of 29 specs differ
Diameter
C63 Sealander GMT42mm
Astron42mm
Power Reserve
C63 Sealander GMT56h
Astron40h
Water Resistance
C63 Sealander GMT150m
Astron100m
MSRP
C63 Sealander GMT$1,675
Astron$2,500

Full specifications

Case

7 specs
Thickness
11.5mm
12.4mm
Lug-to-Lug
48.5mm
49.5mm
Lug Width
22mm
14mm
Material
Stainless Steel
Titanium
Finish
Brushed + Polished + Sandblasted
Brushed and polished
Water Resistance
150m
100m
Caseback
Display
Solid

Crystal & Dial

3 specs
AR Coating
Inner
Super-clear coating
Dial Color
Blue
Black
Lume
SLN X1 BL C1
LumiBrite on hands and index(es)

Movement

6 specs
Caliber
SW330
5X83
Type
Automatic
Quartz
Beat Rate
4 vph
28,800 vph
Power Reserve
56h
40h
Jewels
25
14
Complications
GMT, Moonphase, Day-date
None

Pricing

1 specs
MSRP
$1,675
$2,500

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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 GMT

The Christopher Ward C63 Sealander GMT is praised for its comfortable wearability, with reviewers noting its slim profile, short lugs, and 39mm case size, while others prefer the proportions of the 36mm version. The watch features a Light-catcher case with alternating brushed and polished surfaces, and the Bader bracelet is highlighted for its build quality and comfort at its price point. Some owners find the gloss white dial's text and indices small, and the orange accents can appear yellow. The Sellita SW330-2 movement provides caller GMT functionality and a 56-hour power reserve. On balance, owners and reviewers appreciate the Christopher Ward C63 Sealander GMT for its comfortable wearability and solid bracelet construction at its price.

Seiko Astron

Owners widely praise the Seiko Astron for its spectacular technology, solar-powered quartz movement, and GPS time synchronization, making it a convenient grab-and-go option. The watch is frequently noted for its comfortable and lightweight titanium build, with some models featuring well-finished cases and robust ceramic bezels. Reviewers and owners alike highlight the dial's dynamic and shiny appearance, with textured hour markers and high-contrast edges. Accuracy is generally considered good, with figures ranging from +/- 15 seconds per month to within 1/2 second per day, easily corrected by GPS signal. However, some owners note that DST requires manual adjustment and that automatic time syncing depends on proximity to radio wave towers. The price point is a concern for some, who feel it competes with luxury watches without the same aesthetic appeal. One owner pointed out minimal lume and a slight misalignment of the minute hand on their model.

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