Christopher Ward C63 Sealander Extreme GMTvsOak & Oscar The Humboldt GMT

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Measurements

Catalog photos are all shot at the same flattering size. These aren't: every case below shares one millimeter scale.

Christopher Ward C63 Sealander Extreme GMT at true scale

C63 Sealander Extreme GMT

Oak & Oscar The Humboldt GMT at true scale

The Humboldt GMT

Diameter

41mm

39.5mm

Lug-to-Lug

48mm

46.8mm

lowest

Thickness

12.1mm

lowest

12.5mm

Water Resistance

150m

200m

highest

Power Reserve

56h

56h

MSRP

$2,075

lowest

$2,175

Movement

Sellita SW330-2

Sellita SW330-2

Case

8 specs
Diameter
41mm
39.5mm
Thickness
12.05mm
12.5mm
Lug-to-Lug
48mm
46.8mm
Lug Width
22mm
20mm
Material
Stainless Steel
316L Stainless Steel
Finish
n/a
Brushed
Water Resistance
150m
200m
Caseback
n/a
Solid screw-down

Crystal & Dial

5 specs
Crystal Shape
n/a
Double-domed
AR Coating
n/a
Underside
Dial Color
Black
White
Indices
n/a
Applied
Lume
SLN X1 BL / GL
Super-LumiNova

Movement

2 specs
Power Reserve
56h
56 hoursh
Complications
GMT
None

Pricing

1 specs
MSRP
$2,075
$2,175
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Reviews

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, with reviewers highlighting its impressive lume and tactical, travel-ready design. Owners and reviewers note its 41mm brushed steel case, Globolight lume, and Sellita SW330-2 movement, which is generally considered reliable despite a standard accuracy rating of ±20 seconds per day. Some find the green dial an acquired taste and consider its hands and markers less refined than those on significantly more expensive watches. On balance, owners and reviewers rate the Christopher Ward C63 Sealander Extreme GMT highly for its impressive lume and value proposition.

Oak & Oscar The Humboldt GMT

Oak & Oscar The Humboldt GMT is praised for its exceptional accuracy, often running at or near 0 seconds per day, and its robust construction quality for the price. Owners highlight the sandwich dial construction with its signature date window and orange accents, along with its anti-magnetic properties. Some find the bracelet sizing adjustment slightly awkward and note the lume could be brighter. On balance, owners and reviewers rate the Oak & Oscar The Humboldt GMT highly for its precise timekeeping and solid build at its price point.

From video reviewers

The Humboldt GMT's sandwich dial and true GMT complication deliver practical traveler functionality in a 40mm brushed stainless steel case with 20ATM water resistance. Swiss-made movement construction with anti-shock and anti-magnetic properties meets tight manufacturing tolerances and rigorous testing standards. Positioning against sub-$2,000 GMT competitors raises questions about value proposition relative to alternatives in this price tier.

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