Side by side

Christopher Ward C63 Sealander Extreme GMTvsSeestern S446 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
S446 GMT
SeesternS446 GMT
MSRP $299

At a glance

17 of 29 specs differ
Diameter
C63 Sealander Extreme GMT48mm
S446 GMT39.5mm
Power Reserve
C63 Sealander Extreme GMT56h
S446 GMT41hh
Water Resistance
C63 Sealander Extreme GMT150m
S446 GMT100m
MSRP
C63 Sealander Extreme GMT$1,850
S446 GMT$299

Full specifications

Case

7 specs
Diameter
48mm
39.5mm
Thickness
12.05mm
13mm
Lug-to-Lug
48mm
47mm
Lug Width
22mm
20mm
Material
Stainless Steel
316L Stainless Steel
Finish
Brushed + Bead-blasted + Sandblasted
Brushed and polished
Water Resistance
150m
100m

Crystal & Dial

4 specs
Crystal Shape
Flat
Domed
AR Coating
Underside
Inner
Dial Color
Black
Cream
Lume
SLN X1 BL / GL
None

Movement

5 specs
Caliber
SW330
Seiko NH34A GMT
Beat Rate
4 vph
3 vph
Power Reserve
56h
41hh
Jewels
25
24
Complications
GMT, Moonphase, Day-date
GMT, Date

Pricing

1 specs
MSRP
$1,850
$299

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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.

Seestern S446 GMT

Owners widely praise the Seestern S446 GMT for its stunning finishing and extreme value, with a sapphire crystal and adjustable clasp. The winding action is noted as buttery smooth, and the 39.5mm case size is considered very wearable. Some owners, however, flag the lume as a weak point and one owner found the bracelet clasp lacked sufficient micro-adjustment. The Seestern S446 GMT is considered an extreme value for the dollar. Overall, owners rate the Seestern S446 GMT highly for its exceptional finishing and value proposition at its price point.

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