Side by side

Serica Ref. 5303 Diving ChronometervsCWC G10 Fatboy-80 Quartz Re-Issue Watch

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
G10 Fatboy-80 Quartz Re-Issue Watch
CWCG10 Fatboy-80 Quartz Re-Issue Watch
MSRP $333

At a glance

14 of 29 specs differ
Diameter
Ref. 5303 Diving Chronometer39mm
G10 Fatboy-80 Quartz Re-Issue Watch38mm
Power Reserve
Ref. 5303 Diving Chronometer42h
G10 Fatboy-80 Quartz Re-Issue Watch40h
Water Resistance
Ref. 5303 Diving Chronometer300m
G10 Fatboy-80 Quartz Re-Issue Watch50m
MSRP
Ref. 5303 Diving Chronometer$1,768
G10 Fatboy-80 Quartz Re-Issue Watch$333

Full specifications

Case

6 specs
Category
Diver
Pilot
Diameter
39mm
38mm
Thickness
12.2mm
13mm
Lug-to-Lug
46.5mm
43mm
Lug Width
20mm
18.5mm
Water Resistance
300m
50m

Crystal & Dial

3 specs
Crystal
Sapphire
Acrylic
AR Coating
Yes
Inner
Dial Color
Enamel Black
CWC G10 Fatboy-80 Quartz Re-Issue Watch

Movement

4 specs
Caliber
M100 COSC
ETA F06.461
Type
Automatic
Quartz
Power Reserve
42h
40h
Complications
COSC
None

Pricing

1 specs
MSRP
$1,768
$333

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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.

CWC G10 Fatboy-80 Quartz Re-Issue Watch

Owners widely praise the CWC G10 Fatboy-80 Quartz Re-Issue Watch for its 36mm size and comfortable, "chunky" wearability, with one owner calling it their "perfect watch." The bead-blasted stainless steel case, fixed spring bars, and acrylic crystal that scratches but buffs out are noted features. Some enthusiasts point out the dial's "T" marking alongside Super-LumiNova as a detail difference from originals, and one owner found the reissue's crystal magnified the dial more. The 50m water resistance is considered sufficient for its field watch purpose. On balance, owners rate the CWC G10 Fatboy-80 Quartz Re-Issue Watch highly for its comfortable wearability and distinct dial at its price point.

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