Side by side

Serica Ref. 5303 Diving ChronometervsNodus Unity

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
Unity
NodusUnity
MSRP $725

At a glance

13 of 29 specs differ
Diameter
Ref. 5303 Diving Chronometer39mm
Unity36.5mm
Power Reserve
Ref. 5303 Diving Chronometer42h
Unity41h
Water Resistance
Ref. 5303 Diving Chronometer300m
Unity150m
MSRP
Ref. 5303 Diving Chronometer$1,768
Unity$725

Full specifications

Case

5 specs
Category
Diver
Dress
Diameter
39mm
36.5mm
Thickness
12.2mm
11.3mm
Lug-to-Lug
46.5mm
43.5mm
Water Resistance
300m
150m

Crystal & Dial

3 specs
Crystal Shape
Flat
Box
Dial Color
Enamel Black
Lume
Super-LumiNova
Swiss Super-LumiNova® BGW9 Grade A

Movement

4 specs
Caliber
M100 COSC
Miyota Cal.9015 Premium Automatic
Power Reserve
42h
41h
Jewels
25
24
Complications
COSC
None

Pricing

1 specs
MSRP
$1,768
$725

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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.

Nodus Unity

The Nodus Unity is praised for its novel design, featuring a fixed ceramic bezel and a textured sunray dial, and its slim 36.5mm case. It is powered by a Miyota 9015 movement, regulated to ±8 seconds per day, with a 41-hour power reserve and 150m water resistance. Reviewers note the well-executed bracelet with a five-position extension clasp, though its aesthetic is compromised when fully extended. Some find the dial colors may not appeal to everyone. Overall, reviewers highlight the Nodus Unity's refined yet playful sports watch aesthetic and slim wearability at its price point.

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