Which is cheaper, the Serica Ref. 5303 Diving Chronometer or the Hitori Nexus?

At MSRP the Hitori Nexus is the cheaper of the two at $940, against $1,768 for the Serica Ref. 5303 Diving Chronometer — a $828 gap before any retailer discounting.

Which is bigger, the Serica Ref. 5303 Diving Chronometer or the Hitori Nexus?

The Hitori Nexus wears larger at 39.5mm versus 39mm for the Serica Ref. 5303 Diving Chronometer — a 0.5mm difference across the dial.

Which has better water resistance, the Serica Ref. 5303 Diving Chronometer or the Hitori Nexus?

The Serica Ref. 5303 Diving Chronometer is rated to 300m versus 100m for the Hitori Nexus.

Which has a longer power reserve, the Serica Ref. 5303 Diving Chronometer or the Hitori Nexus?

The Serica Ref. 5303 Diving Chronometer carries a 42-hour power reserve against 41 hours on the Hitori Nexus.

What movement does the Serica Ref. 5303 Diving Chronometer run compared to the Hitori Nexus?

Both watches run automatic movements — the Serica Ref. 5303 Diving Chronometer uses the M100 COSC and the Hitori Nexus uses the Miyota 9015.

Side by side

Serica Ref. 5303 Diving ChronometervsHitori Nexus

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

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Serica Ref. 5303 Diving Chronometer

5303-1-diving-chronometer

MSRP $1,768

MSRP $940

At a glance

14 of 29 specs differ

Diameter

Ref. 5303 Diving Chronometer39mm

Nexus39.5mm

Power Reserve

Ref. 5303 Diving Chronometer42h

Nexus41h

Water Resistance

Ref. 5303 Diving Chronometer300m

Nexus100m

MSRP

Ref. 5303 Diving Chronometer$1,768

Nexus$940

Full specifications

Case

7 specs

Crystal & Dial

3 specs

AR Coating

Yes

Inner

Dial Color

Enamel Black

Turquoise

Lume

Super-LumiNova

None

Movement

3 specs

Caliber

M100 COSC

Miyota 9015

Power Reserve

42h

41h

Complications

COSC

None

Pricing

1 specs

MSRP

$1,768

$940

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At a glance

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