Side by side

Christopher Ward C63 Sealander Extreme GMTvsYema Navygraf Marine Nationale CMM.10

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
Navygraf Marine Nationale CMM.10
YemaNavygraf Marine Nationale CMM.10
MSRP $1,614

At a glance

16 of 29 specs differ
Diameter
C63 Sealander Extreme GMT48mm
Navygraf Marine Nationale CMM.1039mm
Power Reserve
C63 Sealander Extreme GMT56h
Navygraf Marine Nationale CMM.1040h
Water Resistance
C63 Sealander Extreme GMT150m
Navygraf Marine Nationale CMM.10100m
MSRP
C63 Sealander Extreme GMT$1,850
Navygraf Marine Nationale CMM.10$1,614

Full specifications

Case

8 specs
Category
GMT
Diver
Diameter
48mm
39mm
Thickness
12.05mm
11mm
Lug-to-Lug
48mm
46mm
Lug Width
22mm
19mm
Material
Stainless Steel
316L Stainless Steel
Finish
Brushed + Bead-blasted + Sandblasted
Brushed and polished
Water Resistance
150m
100m

Crystal & Dial

3 specs
Crystal
Sapphire
Domed Sapphire
AR Coating
Underside
Inner
Lume
SLN X1 BL / GL
None

Movement

4 specs
Caliber
SW330
Yema CMM.10
Beat Rate
4 vph
28,800 vph
Power Reserve
56h
40h
Complications
GMT, Moonphase, Day-date
None

Pricing

1 specs
MSRP
$1,850
$1,614

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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.

Yema Navygraf Marine Nationale CMM.10

The Yema Navygraf Marine Nationale CMM.10 is lauded for its vibrant blue dial and bezel, a slimmer 39mm case at 11mm thick, and its in-house CMM.10 caliber offering a 70-hour power reserve. Reviewers highlight the clean, legible dial, blue sapphire bezel insert, and competitive pricing under $2,000. However, the steel bracelet's clasp is noted by multiple sources as rattly and feeling slightly cheap, with one reviewer finding it difficult to open. Accuracy is reported within a range of +5/-3 seconds per day. Overall, reviewers praise the Yema Navygraf Marine Nationale CMM.10 for its attractive design and value proposition, tempered by minor concerns regarding the bracelet clasp.

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