Side by side

Christopher Ward C63 Sealander Extreme GMTvsOak & Oscar The Humboldt GMT

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
The Humboldt GMT
Oak & OscarThe Humboldt GMT
MSRP $2,175

At a glance

15 of 29 specs differ
Diameter
C63 Sealander Extreme GMT48mm
The Humboldt GMT39.5mm
Power Reserve
C63 Sealander Extreme GMT56h
The Humboldt GMT56 hoursh
Water Resistance
C63 Sealander Extreme GMT150m
The Humboldt GMT200m
MSRP
C63 Sealander Extreme GMT$1,850
The Humboldt GMT$2,175

Full specifications

Case

8 specs
Diameter
48mm
39.5mm
Thickness
12.05mm
12.5mm
Lug-to-Lug
48mm
46.8mm
Lug Width
22mm
20mm
Material
Stainless Steel
316L Stainless Steel
Finish
Brushed + Bead-blasted + Sandblasted
Brushed
Water Resistance
150m
200m
Caseback
Solid
Solid screw-down

Crystal & Dial

3 specs
Crystal Shape
Flat
Double-domed
Dial Color
Black
White
Lume
SLN X1 BL / GL
Super-LumiNova

Movement

3 specs
Caliber
SW330
Sellita SW330
Power Reserve
56h
56 hoursh
Complications
GMT, Moonphase, Day-date
None

Pricing

1 specs
MSRP
$1,850
$2,175

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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.

Oak & Oscar The Humboldt GMT

Oak & Oscar The Humboldt GMT owners widely praise its exceptional accuracy, often running at or near 0 seconds per day, and its comfortable wearability with subtle design details. The construction quality for the price point, sandwich lume, and anti-magnetic properties are also highlighted. Some owners find the bracelet sizing adjustment slightly awkward, and one noted the lume could be brighter. Overall, owners rate the Oak & Oscar The Humboldt GMT highly for its accuracy and comfortable wearability.

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