Side by side

Christopher Ward C63 Sealander Extreme GMTvsSeiko Prospex Sea

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 $1,850
Prospex Sea
SeikoProspex Sea
MSRP $1,500

At a glance

15 of 29 specs differ
Diameter
C63 Sealander Extreme GMT48mm
Prospex Sea43.5mm
Power Reserve
C63 Sealander Extreme GMT56h
Prospex Sea70h
Water Resistance
C63 Sealander Extreme GMT150m
Prospex Sea200m
MSRP
C63 Sealander Extreme GMT$1,850
Prospex Sea$1,500

Full specifications

Case

7 specs
Category
GMT
Diver
Diameter
48mm
43.5mm
Thickness
12.05mm
13.3mm
Lug-to-Lug
48mm
51mm
Material
Stainless Steel
Titanium
Finish
Brushed + Bead-blasted + Sandblasted
Brushed and polished
Water Resistance
150m
200m

Crystal & Dial

2 specs
AR Coating
Underside
Anti-reflective coating on inner surface
Lume
SLN X1 BL / GL
LumiBrite on hands and index(es)

Movement

5 specs
Caliber
SW330
6R35
Beat Rate
4 vph
28,800 vph
Power Reserve
56h
70h
Jewels
25
24
Complications
GMT, Moonphase, Day-date
None

Pricing

1 specs
MSRP
$1,850
$1,500

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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 Extreme GMT

Owners and reviewers widely praise the Christopher Ward C63 Sealander Extreme GMT for its excellent value, tactical and travel-ready design, and impressive lume, with the black dial being a collective favorite. Its 41mm brushed steel case is noted for comfort and wearability, complemented by a well-proportioned design and excellent legibility. The watch features a Sellita SW330-2 movement with a 56-hour power reserve and 150m water resistance, including a shock-absorbing mount. Some find its refinement slightly less than pricier alternatives, and its GMT movement is considered less practical than a flyer GMT. On balance, the Christopher Ward C63 Sealander Extreme GMT is highly regarded by owners and reviewers for its compelling blend of features, rugged design, and exceptional value.

Seiko Prospex Sea

Seiko Prospex Sea owners and reviewers praise its Marinemaster-style aesthetic, excellent case finishing, and impressive LumiBrite lume. The watch is powered by the 6R15 movement with a 50-hour power reserve and comes with both a steel bracelet and a silicone strap. Some owners find the Seiko Prospex Sea to be a great value and a suitable first "proper" watch, while others report it is uncomfortably big, thick, and heavy on smaller wrists. Reviewers note the GMT function is secondary with a less prominent scale, and the bezel's quieter clicks may not appeal to all. On balance, owners and reviewers rate the Seiko Prospex Sea highly for its classic design and finishing at its price point.

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