Which is cheaper, the Serica Ref. 5303 Diving Chronometer or the Islander Automatic Turtle Dive Watch with Blue Dial #ISL-301?

At MSRP the Islander Automatic Turtle Dive Watch with Blue Dial #ISL-301 is the cheaper of the two at $399, against $1,768 for the Serica Ref. 5303 Diving Chronometer — a $1,369 gap before any retailer discounting.

Which is bigger, the Serica Ref. 5303 Diving Chronometer or the Islander Automatic Turtle Dive Watch with Blue Dial #ISL-301?

The Islander Automatic Turtle Dive Watch with Blue Dial #ISL-301 wears larger at 45mm versus 39mm for the Serica Ref. 5303 Diving Chronometer — a 6mm difference across the dial.

Which has better water resistance, the Serica Ref. 5303 Diving Chronometer or the Islander Automatic Turtle Dive Watch with Blue Dial #ISL-301?

The Serica Ref. 5303 Diving Chronometer is rated to 300m versus 200m for the Islander Automatic Turtle Dive Watch with Blue Dial #ISL-301.

What movement does the Serica Ref. 5303 Diving Chronometer run compared to the Islander Automatic Turtle Dive Watch with Blue Dial #ISL-301?

Both watches run automatic movements — the Serica Ref. 5303 Diving Chronometer uses the M100 COSC and the Islander Automatic Turtle Dive Watch with Blue Dial #ISL-301 uses the Seiko NH36.

Side by side

Serica Ref. 5303 Diving ChronometervsIslander Islander Automatic Turtle Dive Watch with Blue Dial #ISL-301

The numbers, the dial colors, the calibers — laid out so you can stop flipping between tabs.

Serica Ref. 5303 Diving Chronometer

5303-1-diving-chronometer

MSRP $1,768

Islander Islander Automatic Turtle Dive Watch with Blue Dial #ISL-301

islander-automatic-turtle-dive-watch-with-blue-dial-isl-301

MSRP $399

At a glance

18 of 29 specs differ

Diameter

Ref. 5303 Diving Chronometer39mm

Islander Automatic Turtle Dive Watch with Blue Dial #ISL-30145mm

Power Reserve

Ref. 5303 Diving Chronometer42h

Islander Automatic Turtle Dive Watch with Blue Dial #ISL-301—

Water Resistance

Ref. 5303 Diving Chronometer300m

Islander Automatic Turtle Dive Watch with Blue Dial #ISL-301200m

MSRP

Ref. 5303 Diving Chronometer$1,768

Islander Automatic Turtle Dive Watch with Blue Dial #ISL-301$399

Full specifications

Case

7 specs

Diameter

39mm

45mm

Thickness

12.2mm

15mm

Lug-to-Lug

46.5mm

47mm

Lug Width

20mm

22mm

Finish

Brushed and polished

—

Water Resistance

300m

200m

Caseback

Solid

Embossed screw-in caseback

Crystal & Dial

5 specs

Crystal Shape

Flat

Double Domed

AR Coating

Yes

Underside

Dial Color

Enamel Black

—

Indices

Applied

—

Lume

Super-LumiNova

None

Movement

5 specs

Caliber

M100 COSC

Seiko NH36

Beat Rate

28,800 vph

0 vph

Power Reserve

42h

Jewels

Complications

COSC

None

Pricing

1 specs

MSRP

$1,768

$399

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