Side by side

Christopher Ward C63 Sealander Extreme GMTvsGrand Seiko SLGA015

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
SLGA015
Grand SeikoSLGA015
MSRP $12,600

At a glance

16 of 29 specs differ
Diameter
C63 Sealander Extreme GMT48mm
SLGA01543.8mm
Power Reserve
C63 Sealander Extreme GMT56h
SLGA015120h
Water Resistance
C63 Sealander Extreme GMT150m
SLGA015200m
MSRP
C63 Sealander Extreme GMT$1,850
SLGA015$12,600

Full specifications

Case

8 specs
Category
GMT
Diver
Diameter
48mm
43.8mm
Thickness
12.05mm
13.8mm
Lug-to-Lug
48mm
51.5mm
Lug Width
22mm
23mm
Material
Stainless Steel
Titanium
Finish
Brushed + Bead-blasted + Sandblasted
Brushed and polished
Water Resistance
150m
200m

Crystal & Dial

2 specs
AR Coating
Underside
Yes
Lume
SLN X1 BL / GL
None

Movement

5 specs
Caliber
SW330
9RA5
Type
Automatic
Spring Drive
Beat Rate
4 vph
28,800 vph
Power Reserve
56h
120h
Complications
GMT, Moonphase, Day-date
None

Pricing

1 specs
MSRP
$1,850
$12,600

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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.

Grand Seiko SLGA015

The Grand Seiko SLGA015 is widely praised for its exceptional accuracy, with owners reporting performance far exceeding the stated 10 seconds per month. The Spring Drive movement's smooth sweep and 5-day power reserve are also noted strengths, as is the lighter titanium case construction. However, some owners find the bracelet extension non-intuitive, and one noted the clasp scratched easily. The watch features a nature-inspired, wave-like dial texture. Overall, owners rate the Grand Seiko SLGA015 highly for its impressive accuracy and quality construction.

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