Side by side

Serica Ref. 5303 Diving ChronometervsLongines MASTER COLLECTION

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
MASTER COLLECTION
LonginesMASTER COLLECTION
MSRP $2,350

At a glance

19 of 29 specs differ
Diameter
Ref. 5303 Diving Chronometer39mm
MASTER COLLECTION29mm
Power Reserve
Ref. 5303 Diving Chronometer42h
MASTER COLLECTION45h
Water Resistance
Ref. 5303 Diving Chronometer300m
MASTER COLLECTION30m
MSRP
Ref. 5303 Diving Chronometer$1,768
MASTER COLLECTION$2,350

Full specifications

Case

8 specs
Category
Diver
Diameter
39mm
29mm
Thickness
12.2mm
9mm
Lug-to-Lug
46.5mm
34.5mm
Lug Width
20mm
15mm
Finish
Brushed and polished
Water Resistance
300m
30m
Caseback
Solid
Transparent case back with sapphire crystal

Crystal & Dial

4 specs
Crystal Shape
Flat
AR Coating
Yes
Dial Color
Enamel Black
Silver
Indices
Applied
Painted Arabic numerals

Movement

6 specs
Caliber
M100 COSC
L592.5
Power Reserve
42h
45h
Jewels
25
0
Hacking
Yes
No
Hand-winding
Yes
No
Complications
COSC
Hours, minutes, seconds and date

Pricing

1 specs
MSRP
$1,768
$2,350

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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.

Longines MASTER COLLECTION

Owners and reviewers widely praise the Longines Master Collection for its excellent finishing and value, with specific mentions of beautiful dials featuring engraved Breguet numerals and blued hands. The movement offers a 72-hour power reserve, and the classical design is noted as versatile. Some owners report the bracelet lacks sufficient micro-adjustment options for a precise fit, and one owner experienced a broken moon phase setting mechanism requiring service. The Master Collection Annual Calendar has 30m water resistance, considered light by one reviewer. Overall, the consensus is that owners and reviewers rate the Longines Master Collection highly for its exceptional value and refined finishing.

From video reviewers

The watch has a strong wrist presence and comfort. The movement accuracy is also a notable feature, delivering luxury value at its price point.

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