Side by side

Serica Ref. 5303 Diving ChronometervsSeiko 5 Sports SKX series MOONEYES Limited Edition

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

At a glance

16 of 29 specs differ
Diameter
Ref. 5303 Diving Chronometer39mm
5 Sports SKX series MOONEYES Limited Edition42.5mm
Power Reserve
Ref. 5303 Diving Chronometer42h
5 Sports SKX series MOONEYES Limited Edition41h
Water Resistance
Ref. 5303 Diving Chronometer300m
5 Sports SKX series MOONEYES Limited Edition100m
MSRP
Ref. 5303 Diving Chronometer$1,768
5 Sports SKX series MOONEYES Limited Edition$420

Full specifications

Case

6 specs
Category
Diver
Sport
Diameter
39mm
42.5mm
Thickness
12.2mm
13.4mm
Lug-to-Lug
46.5mm
46mm
Lug Width
20mm
22mm
Water Resistance
300m
100m

Crystal & Dial

5 specs
Crystal
Sapphire
Hardlex
Crystal Shape
Flat
Curved
AR Coating
Yes
Inner
Dial Color
Enamel Black
Black
Lume
Super-LumiNova
LumiBrite on hands, index(es) and bezel

Movement

4 specs
Caliber
M100 COSC
4R36
Power Reserve
42h
41h
Jewels
25
24
Complications
COSC
None

Pricing

1 specs
MSRP
$1,768
$420

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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.

Seiko 5 Sports SKX series MOONEYES Limited Edition

The Seiko 5 Sports SKX series MOONEYES Limited Edition is praised for its bold, sporty design, featuring a vibrant yellow sunray dial and a unique acrylic bezel insert that evokes hot-rodding culture. Owners note the surprisingly wearable yellow color and the distinctive Mooneyes branding that stands out in person. The 42.5mm case is complemented by a short 46mm lug-to-lug distance, allowing for comfortable wear on smaller wrists. It is powered by the 4R36 automatic movement, offering a 41-hour power reserve, and comes with both a steel bracelet and a striped nylon strap. Overall, owners and reviewers appreciate the Seiko 5 Sports SKX series MOONEYES Limited Edition for its fun, retro aesthetic and comfortable wearability at an affordable price point.

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