Side by side

Christopher Ward C63 Sealander Extreme GMTvsStudio Underd0g Full Moon

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
Full Moon
Studio Underd0gFull Moon
MSRP $800

At a glance

16 of 29 specs differ
Diameter
C63 Sealander Extreme GMT48mm
Full Moon39.5mm
Power Reserve
C63 Sealander Extreme GMT56h
Full Moon40h
Water Resistance
C63 Sealander Extreme GMT150m
Full Moon
MSRP
C63 Sealander Extreme GMT$1,850
Full Moon$800

Full specifications

Case

7 specs
Category
GMT
Casual
Diameter
48mm
39.5mm
Thickness
12.05mm
Lug-to-Lug
48mm
Lug Width
22mm
Finish
Brushed + Bead-blasted + Sandblasted
Brushed and polished
Water Resistance
150m

Crystal & Dial

3 specs
AR Coating
Underside
Inner
Dial Color
Black
Standard
Lume
SLN X1 BL / GL
None

Movement

5 specs
Caliber
SW330
Type
Automatic
Manual
Beat Rate
4 vph
28,800 vph
Power Reserve
56h
40h
Complications
GMT, Moonphase, Day-date
None

Pricing

1 specs
MSRP
$1,850
$800

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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.

Studio Underd0g Full Moon

Owners widely praise the Studio Underd0g Full Moon's harmonious creamy dial and its 37mm case, which fits flawlessly. The innovative sapphire disc with numerals is a highlight, though two visible screws holding it are noted as a minor aesthetic drawback. Some owners find the watch overpriced, while others see value in the upgraded Sellita movement under $1k. Lume is surprisingly good, and the included NATO strap is preferred by some over the leather. Accuracy ranges from +1/+2 seconds per day to about -6 seconds per day. On balance, owners rate the Studio Underd0g Full Moon highly for its versatile dial and well-fitting case at the price point.

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