Side by side

Christopher Ward C63 Sealander Extreme GMTvsLongines ULTRA‑CHRON CARBON

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
ULTRA‑CHRON CARBON
LonginesULTRA‑CHRON CARBON
MSRP $5,550

At a glance

21 of 29 specs differ
Diameter
C63 Sealander Extreme GMT40mm
ULTRA‑CHRON CARBON43mm
Power Reserve
C63 Sealander Extreme GMT56h
ULTRA‑CHRON CARBON52h
Water Resistance
C63 Sealander Extreme GMT150m
ULTRA‑CHRON CARBON300m
MSRP
C63 Sealander Extreme GMT$2,075
ULTRA‑CHRON CARBON$5,550

Full specifications

Case

8 specs
Category
GMT
Diver
Diameter
40mm
43mm
Thickness
12.05mm
14mm
Lug-to-Lug
48mm
48.9mm
Material
Stainless Steel
Titanium
Finish
Brushed and polished
Water Resistance
150m
300m
Caseback
Solid
Screw-down case back

Crystal & Dial

5 specs
Crystal Shape
Flat
AR Coating
Inner
Both sides
Dial Color
Black
Silver
Indices
Applied
Applied indexes
Lume
SLN X1 BL / GL
Super-LumiNova

Movement

7 specs
Caliber
SW330-2
L836.6
Beat Rate
4 vph
36,000 vph
Power Reserve
56h
52h
Jewels
25
0
Hacking
Yes
No
Hand-winding
Yes
No
Complications
GMT
Hours, minutes, seconds

Pricing

1 specs
MSRP
$2,075
$5,550

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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

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.

Longines ULTRA‑CHRON CARBON

The Longines ULTRA‑CHRON CARBON is praised for its lightweight composite case and unique "Batman" aesthetic, with its 5Hz movement widely noted for exceptional accuracy. Owners widely report the high-beat movement is the cheapest 5Hz option available. Some owners find the non-rotating bezel a relief, while others consider it a deal-breaker, noting the watch is no longer a dive watch. On balance, owners and reviewers highly rate the Longines ULTRA‑CHRON CARBON for its cool, lightweight design and the exceptional accuracy of its 5Hz movement.

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