Side by side

Serica Ref. 5303 Diving ChronometervsSeiko Coutura

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
Coutura
SeikoCoutura
MSRP $595

At a glance

15 of 29 specs differ
Diameter
Ref. 5303 Diving Chronometer39mm
Coutura42.5mm
Power Reserve
Ref. 5303 Diving Chronometer42h
Coutura40h
Water Resistance
Ref. 5303 Diving Chronometer300m
Coutura100m
MSRP
Ref. 5303 Diving Chronometer$1,768
Coutura$595

Full specifications

Case

6 specs
Category
Diver
Dress
Diameter
39mm
42.5mm
Thickness
12.2mm
10.2mm
Lug-to-Lug
46.5mm
46mm
Lug Width
20mm
12mm
Water Resistance
300m
100m

Crystal & Dial

3 specs
AR Coating
Yes
Inner
Dial Color
Enamel Black
Black
Lume
Super-LumiNova
LumiBrite on hands and index(es)

Movement

5 specs
Caliber
M100 COSC
V157
Type
Automatic
Quartz
Power Reserve
42h
40h
Jewels
25
2
Complications
COSC
None

Pricing

1 specs
MSRP
$1,768
$595

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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 Coutura

Seiko Coutura owners widely praise its wear-resistant metal treatments, with one reporting minimal scratches after six years. The watch is also lauded for its solar and perpetual calendar features, offering a "set it and forget it" experience with 100m water resistance. Owners appreciate its weight and captivating appearance, with one purchasing it for $410.88. The aesthetic, featuring contrasting gold indices and hands against a black dial, is considered appealing by some, particularly those who enjoy its unique and fun design. However, opinions on styling are divided, with some finding the dial too busy and gaudy, and others describing the line as large or sitting too high. The proprietary bracelet is also noted as a downside by some owners. One owner reports the solar power reserve can be problematic if not exposed to light regularly, while another calls their kinetic perpetual a beautiful keeper with a 4-year reserve.

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