Side by side

Serica Ref. 5303 Diving ChronometervsSeiko 5 Sports Field series

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
5 Sports Field series
Seiko5 Sports Field series
MSRP $315

At a glance

15 of 29 specs differ
Diameter
Ref. 5303 Diving Chronometer39mm
5 Sports Field series39.4mm
Power Reserve
Ref. 5303 Diving Chronometer42h
5 Sports Field series41h
Water Resistance
Ref. 5303 Diving Chronometer300m
5 Sports Field series100m
MSRP
Ref. 5303 Diving Chronometer$1,768
5 Sports Field series$315

Full specifications

Case

5 specs
Category
Diver
Sport
Diameter
39mm
39.4mm
Thickness
12.2mm
13.2mm
Lug-to-Lug
46.5mm
48.1mm
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 and index(es)

Movement

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

Pricing

1 specs
MSRP
$1,768
$315

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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 Field series

The Seiko 5 Sports Field series is praised for its value, offering an accessible explorer-style watch with a GMT complication and excellent legibility thanks to LumiBrite on the dial and bezel. The watches feature a 41mm stainless steel case, 100m water resistance, and are powered by either the 4R36 or 4R34 movement, both with a 41-hour power reserve. One reviewer notes the inclusion of a compass bezel with a lumed pearl and fully lumed Arabic numerals on the dial for the non-GMT models. Overall, reviewers consider the Seiko 5 Sports Field GMT models good value under 500 euros.

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