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 $2,950

At a glance

21 of 29 specs differ
Diameter
Ref. 5303 Diving Chronometer39mm
MASTER COLLECTION34mm
Power Reserve
Ref. 5303 Diving Chronometer42h
MASTER COLLECTION72h
Water Resistance
Ref. 5303 Diving Chronometer300m
MASTER COLLECTION30m
MSRP
Ref. 5303 Diving Chronometer$1,768
MASTER COLLECTION$2,950

Full specifications

Case

8 specs
Category
Diver
Diameter
39mm
34mm
Thickness
12.2mm
9.2mm
Lug-to-Lug
46.5mm
41.7mm
Lug Width
20mm
18mm
Finish
Brushed and polished
Water Resistance
300m
30m
Caseback
Solid

Crystal & Dial

5 specs
Crystal Shape
Flat
AR Coating
Yes
Dial Color
Enamel Black
Silver
Indices
Applied
Lume
Super-LumiNova
None

Movement

7 specs
Caliber
M100 COSC
L888.5
Beat Rate
28,800 vph
0 vph
Power Reserve
42h
72h
Jewels
25
0
Hacking
Yes
No
Hand-winding
Yes
No
Complications
COSC
None

Pricing

1 specs
MSRP
$1,768
$2,950

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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

The Longines Master Collection is widely praised for its excellent value and refined design, with owners and reviewers highlighting its beautiful dials, often featuring Breguet numerals and snailed subdials, and its impressive case and bracelet finishing. The collection is consistently described as traditional and dress-oriented, offering features like column-wheel chronographs and moon phases at competitive price points. However, some owners note drawbacks such as the subdial cutting off numerals, uninspiring pushers and crowns, and a lack of micro-adjustments on the bracelet for a perfect fit. Accuracy figures are not consistently reported across sources, with one owner noting a chronograph hour counter that doesn't always reset to zero. Overall, the Longines Master Collection is highly regarded by owners and reviewers for its sophisticated aesthetics and strong value proposition, particularly for its dress watch and chronograph models.

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