Side by side

Serica Ref. 5303 Diving ChronometervsChristopher Ward C63 Sealander GMT

The numbers, the dial colors, the calibers — laid out so you can stop flipping between tabs.

Ref. 5303 Diving Chronometer
SericaRef. 5303 Diving Chronometer
MSRP $1,768
C63 Sealander GMT
Christopher WardC63 Sealander GMT
MSRP $1,675

At a glance

16 of 29 specs differ
Diameter
Ref. 5303 Diving Chronometer39mm
C63 Sealander GMT42mm
Power Reserve
Ref. 5303 Diving Chronometer42h
C63 Sealander GMT56h
Water Resistance
Ref. 5303 Diving Chronometer300m
C63 Sealander GMT150m
MSRP
Ref. 5303 Diving Chronometer$1,768
C63 Sealander GMT$1,675

Full specifications

Case

8 specs
Category
Diver
GMT
Diameter
39mm
42mm
Thickness
12.2mm
11.5mm
Lug-to-Lug
46.5mm
48.5mm
Lug Width
20mm
22mm
Finish
Brushed and polished
Brushed + Polished + Sandblasted
Water Resistance
300m
150m
Caseback
Solid
Display

Crystal & Dial

3 specs
AR Coating
Yes
Inner
Dial Color
Enamel Black
Blue
Lume
Super-LumiNova
SLN X1 BL C1

Movement

4 specs
Caliber
M100 COSC
SW330
Beat Rate
28,800 vph
4 vph
Power Reserve
42h
56h
Complications
COSC
GMT, Moonphase, Day-date

Pricing

1 specs
MSRP
$1,768
$1,675

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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.

Serica Ref. 5303 Diving Chronometer

Owners widely praise the Serica Ref. 5303 Diving Chronometer for its excellent wearability, definitive style, and smooth, confident bezel action. The dual scale on the bezel is noted as surprisingly useful, and the crown action, winding, and hacking are reported to work perfectly. One owner describes the Serica 5303-3 as gorgeous and unique, though another notes the crown can appear comically large. On balance, owners rate the Serica Ref. 5303 Diving Chronometer highly for its blend of unique design and robust functionality.

Christopher Ward C63 Sealander GMT

The Christopher Ward C63 Sealander GMT is praised for its comfortable wearability, with reviewers noting its slim profile, short lugs, and 39mm case size, while others prefer the proportions of the 36mm version. The watch features a Light-catcher case with alternating brushed and polished surfaces, and the Bader bracelet is highlighted for its build quality and comfort at its price point. Some owners find the gloss white dial's text and indices small, and the orange accents can appear yellow. The Sellita SW330-2 movement provides caller GMT functionality and a 56-hour power reserve. On balance, owners and reviewers appreciate the Christopher Ward C63 Sealander GMT for its comfortable wearability and solid bracelet construction at its price.

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