Side by side

Christopher Ward C63 Sealander Extreme GMTvsYema Superman Slim CMM.20

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 $2,075
Superman Slim CMM.20
YemaSuperman Slim CMM.20
MSRP $2,372

At a glance

14 of 29 specs differ
Diameter
C63 Sealander Extreme GMT40mm
Superman Slim CMM.2039mm
Power Reserve
C63 Sealander Extreme GMT56h
Superman Slim CMM.2040h
Water Resistance
C63 Sealander Extreme GMT150m
Superman Slim CMM.20300m
MSRP
C63 Sealander Extreme GMT$2,075
Superman Slim CMM.20$2,372

Full specifications

Case

7 specs
Category
GMT
Diver
Diameter
40mm
39mm
Thickness
12.05mm
9.95mm
Lug-to-Lug
48mm
Lug Width
22mm
20mm
Material
Stainless Steel
316L Stainless Steel
Water Resistance
150m
300m

Crystal & Dial

2 specs
Crystal
Sapphire
Domed Sapphire
Lume
SLN X1 BL / GL
None

Movement

4 specs
Caliber
SW330-2
Yema CMM.20
Beat Rate
4 vph
28,800 vph
Power Reserve
56h
40h
Complications
GMT
None

Pricing

1 specs
MSRP
$2,075
$2,372

Follow this matchup

Get a note when Christopher Ward C63 Sealander Extreme GMT vs Yema Superman Slim CMM.20 gets more votes, a community discussion, or a price drop. No account needed.

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

The Christopher Ward C63 Sealander Extreme GMT is widely praised as a competent and comfortable tool watch offering excellent value. Reviewers consistently highlight its impressive Globolight lume, providing excellent legibility, and its well-proportioned 41mm brushed steel case. The Sellita SW330-2 movement is noted as reliable, though its standard accuracy is stated as ±20 seconds per day, and its GMT functionality is considered less advanced than some alternatives. One owner notes the green dial can be an acquired taste, and hands and markers are considered less refined than those on significantly more expensive watches. The Christopher Ward C63 Sealander Extreme GMT is priced attractively at €1,895 on bracelet. Overall, owners and reviewers highly regard the Christopher Ward C63 Sealander Extreme GMT for its rugged, travel-ready design and impressive lume at its price point.

Yema Superman Slim CMM.20

Owners and reviewers praise the Yema Superman Slim CMM.20 for its appealing retro design, balanced 39mm case, and in-house CMM.20 micro-rotor movement, with some finding the fish scale bracelet attractive. Concerns exist regarding its $2500/€2,490 MSRP, with some owners questioning its value and noting the potential for QC issues or a "jittery" seconds hand attributed to the new movement. The bracelet's articulation and stamped clasp draw criticism, though some owners report it improves with wear. Overall, owners and reviewers appreciate the Yema Superman Slim CMM.20's vintage styling and unique micro-rotor movement, but its value proposition and some finishing details are points of contention.

Keep exploring

More watches worth a look

Matched to the watches above on size, movement, style and price — microbrands first. Open any one to dig in.

Adjacent matchups

People also compared

Comparisons nearby in the catalog — alternatives to the watches above paired against the matchup.