Side by side

Christopher Ward C63 Sealander Extreme GMTvsFormex Reef 39.5 mm

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
Reef 39.5 mm
FormexReef 39.5 mm
MSRP $2,230

At a glance

11 of 29 specs differ
Diameter
C63 Sealander Extreme GMT40mm
Reef 39.5 mm39.5mm
Power Reserve
C63 Sealander Extreme GMT56h
Reef 39.5 mm56h
Water Resistance
C63 Sealander Extreme GMT150m
Reef 39.5 mm300m
MSRP
C63 Sealander Extreme GMT$2,075
Reef 39.5 mm$2,230

Full specifications

Case

5 specs
Category
GMT
Diver
Diameter
40mm
39.5mm
Thickness
12.05mm
11mm
Lug-to-Lug
48mm
45.5mm
Water Resistance
150m
300m

Crystal & Dial

2 specs
Dial Color
Black
Bahama Blue
Lume
SLN X1 BL / GL
Super-LumiNova

Movement

3 specs
Caliber
SW330-2
Sellita SW300-1
Beat Rate
4 vph
28,800 vph
Complications
GMT
None

Pricing

1 specs
MSRP
$2,075
$2,230

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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.

Formex Reef 39.5 mm

The Formex Reef 39.5 mm is widely praised for its refined finishing, comfortable and well-proportioned case design, and impressive specifications for its price point, including COSC-certified Sellita SW300-1 movement and 300m water resistance. Owners and reviewers highlight the tool-less micro-adjust clasp and quick-release spring bars as practical features. Some reviewers note that the 22mm lug width feels slightly disproportionate to the smaller case, and the bracelet could benefit from more taper, though this is a point of contention for some owners who value the overall package. A prototype crown protrusion issue is noted as being addressed for production. On balance, owners and reviewers rate the Formex Reef 39.5 mm highly for its excellent value and well-executed design.

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