Side by side

Serica Ref. 5303 Diving ChronometervsIslander Islander Red October V2 Dive Watch with Radiant Blue Dial #ISL-323

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
Islander Red October V2 Dive Watch with Radiant Blue Dial #ISL-323
IslanderIslander Red October V2 Dive Watch with Radiant Blue Dial #ISL-323
MSRP $449

At a glance

18 of 29 specs differ
Diameter
Ref. 5303 Diving Chronometer39mm
Islander Red October V2 Dive Watch with Radiant Blue Dial #ISL-32342mm
Power Reserve
Ref. 5303 Diving Chronometer42h
Islander Red October V2 Dive Watch with Radiant Blue Dial #ISL-323
Water Resistance
Ref. 5303 Diving Chronometer300m
Islander Red October V2 Dive Watch with Radiant Blue Dial #ISL-323200m
MSRP
Ref. 5303 Diving Chronometer$1,768
Islander Red October V2 Dive Watch with Radiant Blue Dial #ISL-323$449

Full specifications

Case

7 specs
Diameter
39mm
42mm
Thickness
12.2mm
14mm
Lug-to-Lug
46.5mm
0mm
Lug Width
20mm
22mm
Finish
Brushed and polished
Water Resistance
300m
200m
Caseback
Solid
Screw-down

Crystal & Dial

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

Movement

5 specs
Caliber
M100 COSC
Seiko NH38
Beat Rate
28,800 vph
0 vph
Power Reserve
42h
0h
Jewels
25
0
Complications
COSC
None

Pricing

1 specs
MSRP
$1,768
$449

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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.

Islander Red October V2 Dive Watch with Radiant Blue Dial #ISL-323

Owners widely praise the Islander Red October V2 Dive Watch with Radiant Blue Dial #ISL-323 for its stunning radiant blue dial and red seconds hand, with some noting its resemblance to a luxury model. The watch is frequently cited as offering excellent value for its price. Some owners express a dislike for the circle/triangle logo, while others appreciate the availability of both 38mm and 43mm size options. Overall, owners rate the Islander Red October V2 Dive Watch with Radiant Blue Dial #ISL-323 highly for its aesthetic appeal and value proposition.

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