Side by side

Serica Ref. 5303 Diving ChronometervsLorier Olympia SII

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
Olympia SII
LorierOlympia SII
MSRP $999

At a glance

12 of 29 specs differ
Diameter
Ref. 5303 Diving Chronometer39mm
Olympia SII39mm
Power Reserve
Ref. 5303 Diving Chronometer42h
Olympia SII40h
Water Resistance
Ref. 5303 Diving Chronometer300m
Olympia SII
MSRP
Ref. 5303 Diving Chronometer$1,768
Olympia SII$999

Full specifications

Case

4 specs
Category
Diver
Chronograph
Thickness
12.2mm
Lug-to-Lug
46.5mm
Water Resistance
300m

Crystal & Dial

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

Movement

4 specs
Caliber
M100 COSC
Type
Automatic
Manual
Power Reserve
42h
40h
Complications
COSC
None

Pricing

1 specs
MSRP
$1,768
$999

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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 Olympia SII

Owners widely praise the Lorier Olympia SII for its excellent value and vintage aesthetic, highlighting the robust Seiko NE88 movement and crisp chronograph pushers. The 39mm case is noted for wearing well, with its layered design effectively managing the 13.8mm thickness. Some owners prefer the hesalite crystal for its aesthetic, while others would like a sapphire option. The bracelet is described as functional but can be a hair nipper. Overall, owners rate the Lorier Olympia SII highly for its execution of a vintage chronograph at an accessible price point.

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