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 $2,450

At a glance

21 of 29 specs differ
Diameter
Ref. 5303 Diving Chronometer39mm
MASTER COLLECTION34mm
Power Reserve
Ref. 5303 Diving Chronometer42h
MASTER COLLECTION
Water Resistance
Ref. 5303 Diving Chronometer300m
MASTER COLLECTION30m
MSRP
Ref. 5303 Diving Chronometer$1,768
MASTER COLLECTION$2,450

Full specifications

Case

8 specs
Category
Diver
Dress
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
Ivory
Indices
Applied
Lume
Super-LumiNova
None

Movement

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

Pricing

1 specs
MSRP
$1,768
$2,450

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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 widely praise the Longines Master Collection for its excellent value, refined design, and high-quality finishing, with specific mentions of beautiful dials featuring engraved Breguet numerals and attractive vintage aesthetics. The watch is noted for its dressy feel and classic styling, with some owners preferring its wearability to other collections. However, some reviewers flag the subdial cutting off numerals, uninspiring crown and pushers on certain chronograph models, and a lack of micro-adjustments on the bracelet. Other owners find the case finishing homogenous and dial printing less refined, and the collection's traditional styling is sometimes seen as less popular than sportier alternatives. Accuracy figures are not consistently reported across sources, and water resistance is noted as 30m on one variant. Overall, owners and reviewers rate the Longines Master Collection highly for its refined design and exceptional value, particularly for its dress watch offerings.

From video reviewers

The watch's lug-to-lug fit of 44.75mm is a notable combination with its 38.5mm width, making it suitable for smaller wrists. The Longines MASTER COLLECTION's annual calendar function can be finicky, requiring occasional manual adjustments to keep it accurate. Reviewers disagree on the watch's case size, with one reviewer mentioning 40mm and another mentioning 42mm.

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