Side by side

Serica Ref. 5303 Diving ChronometervsHELM Komodo Titanium

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
Komodo Titanium
HELMKomodo Titanium
MSRP $350

At a glance

11 of 29 specs differ
Diameter
Ref. 5303 Diving Chronometer39mm
Komodo Titanium40mm
Power Reserve
Ref. 5303 Diving Chronometer42h
Komodo Titanium40h
Water Resistance
Ref. 5303 Diving Chronometer300m
Komodo Titanium300m
MSRP
Ref. 5303 Diving Chronometer$1,768
Komodo Titanium$350

Full specifications

Case

4 specs
Diameter
39mm
40mm
Thickness
12.2mm
15.5mm
Lug-to-Lug
46.5mm
47mm
Material
Stainless Steel
Titanium

Crystal & Dial

2 specs
Crystal Shape
Flat
Double-Domed
Dial Color
Enamel Black
Black

Movement

4 specs
Caliber
M100 COSC
Seiko Instruments NH35
Power Reserve
42h
40h
Jewels
25
24
Complications
COSC
Date

Pricing

1 specs
MSRP
$1,768
$350

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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.

HELM Komodo Titanium

Owners widely praise the HELM Komodo Titanium for its excellent build quality, top-notch case finishing, dial execution, and abundant BWG9 lume, noting its robust tool watch ethos and exceptional value under $300. The watch features a clean, unique design with a matte white dial, color-matched indices and hands, and a precise 120-click bezel. However, its thickness, cited between 15.2mm and 15.5mm, leads some owners to describe it as chunky or hefty, and the large clasp design is noted as a drawback by one owner. The bezel ridges are also flagged as making it somewhat uncomfortable to turn. On balance, owners rate the HELM Komodo Titanium highly for its exceptional value and robust tool watch build.

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