Side by side

Serica Ref. 5303 Diving ChronometervsLorier Neptune SIV

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
Neptune SIV
LorierNeptune SIV
MSRP $599

At a glance

10 of 29 specs differ
Diameter
Ref. 5303 Diving Chronometer39mm
Neptune SIV39mm
Power Reserve
Ref. 5303 Diving Chronometer42h
Neptune SIV40h
Water Resistance
Ref. 5303 Diving Chronometer300m
Neptune SIV200m
MSRP
Ref. 5303 Diving Chronometer$1,768
Neptune SIV$599

Full specifications

Case

3 specs
Thickness
12.2mm
Lug-to-Lug
46.5mm
Water Resistance
300m
200m

Crystal & Dial

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

Movement

3 specs
Caliber
M100 COSC
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.

Lorier Neptune SIV

Owners widely praise the Lorier Neptune SIV for its versatile, vintage-inspired design featuring a glossy gilt-style dial and a comfortable, tapered bracelet, noting its affordability reduces wear anxiety. Reviewers and owners alike mention the acrylic crystal as a point of contention, with some preferring sapphire, and one owner finds the bracelet lacks the feel of more expensive options. On balance, owners and reviewers rate the Lorier Neptune SIV highly for its appealing vintage aesthetic and value proposition.

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