Side by side

Christopher Ward C63 Sealander Extreme GMTvsSeiko Prospex SPEEDTIMER Mechanical

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
Prospex SPEEDTIMER Mechanical
SeikoProspex SPEEDTIMER Mechanical
MSRP $995

At a glance

15 of 29 specs differ
Diameter
C63 Sealander Extreme GMT40mm
Prospex SPEEDTIMER Mechanical39.5mm
Power Reserve
C63 Sealander Extreme GMT56h
Prospex SPEEDTIMER Mechanical72h
Water Resistance
C63 Sealander Extreme GMT150m
Prospex SPEEDTIMER Mechanical200m
MSRP
C63 Sealander Extreme GMT$2,075
Prospex SPEEDTIMER Mechanical$995

Full specifications

Case

6 specs
Category
GMT
Chronograph
Diameter
40mm
39.5mm
Thickness
12.05mm
12mm
Lug-to-Lug
48mm
44.5mm
Lug Width
22mm
20mm
Water Resistance
150m
200m

Crystal & Dial

3 specs
Crystal Shape
Flat
Curved
AR Coating
Inner
Anti-reflective coating on inner surface
Lume
SLN X1 BL / GL
LumiBrite on hands and index(es)

Movement

5 specs
Caliber
SW330-2
6R55
Beat Rate
4 vph
28,800 vph
Power Reserve
56h
72h
Jewels
25
24
Complications
GMT
None

Pricing

1 specs
MSRP
$2,075
$995

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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 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.

Seiko Prospex SPEEDTIMER Mechanical

The Seiko Prospex SPEEDTIMER Mechanical is praised for its visually appealing design and comfortable wearability, with owners frequently using its chronograph function for daily tasks. Reviewers note its clean dial layout and LumiBrite treated hands and markers, and one source highlights the 72-hour power reserve of the 6R55 movement. However, some owners criticize its chronograph functionality and the 24-hour subdial. On balance, owners and reviewers rate the Seiko Prospex SPEEDTIMER Mechanical highly for its daily usability and refined aesthetics.

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