Side by side

Serica Ref. 5303 Diving ChronometervsZelos Great White 43

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
Great White 43
ZelosGreat White 43
MSRP $599

At a glance

12 of 29 specs differ
Diameter
Ref. 5303 Diving Chronometer39mm
Great White 4343mm
Power Reserve
Ref. 5303 Diving Chronometer42h
Great White 4340h
Water Resistance
Ref. 5303 Diving Chronometer300m
Great White 43300m
MSRP
Ref. 5303 Diving Chronometer$1,768
Great White 43$599

Full specifications

Case

5 specs
Diameter
39mm
43mm
Thickness
12.2mm
12mm
Lug-to-Lug
46.5mm
43mm
Lug Width
20mm
22mm
Material
Stainless Steel
Titanium (DLC coated)

Crystal & Dial

3 specs
AR Coating
Yes
Inner
Dial Color
Enamel Black
Blue
Lume
Super-LumiNova
None

Movement

3 specs
Caliber
M100 COSC
Miyota 9015
Power Reserve
42h
40h
Complications
COSC
None

Pricing

1 specs
MSRP
$1,768
$599

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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.

Zelos Great White 43

Owners widely praise the Zelos Great White 43's "unbelievable" and "amazing" lume, particularly on the carbon and Frost variants. The Miyota 9015 movement and 300m water resistance are noted features. Some owners find the 43mm size large, while others report it wears well. Opinions are divided on colorways, with some disappointed by the absence of a "Nebula" option and others finding the "Arctic" version striking. Overall, owners rate the Zelos Great White 43 highly for its exceptional lume and robust specifications at the price point.

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