Which is cheaper, the Serica Ref. 5303 Diving Chronometer or the Sternglas Naos XS Automatik?

At MSRP the Sternglas Naos XS Automatik is the cheaper of the two at $431, against $1,768 for the Serica Ref. 5303 Diving Chronometer — a $1,337 gap before any retailer discounting.

Which is bigger, the Serica Ref. 5303 Diving Chronometer or the Sternglas Naos XS Automatik?

The Serica Ref. 5303 Diving Chronometer wears larger at 39mm versus 33mm for the Sternglas Naos XS Automatik — a 6mm difference across the dial.

Which has better water resistance, the Serica Ref. 5303 Diving Chronometer or the Sternglas Naos XS Automatik?

The Serica Ref. 5303 Diving Chronometer is rated to 300m versus 50m for the Sternglas Naos XS Automatik.

What movement does the Serica Ref. 5303 Diving Chronometer run compared to the Sternglas Naos XS Automatik?

Both watches run automatic movements — the Serica Ref. 5303 Diving Chronometer uses the M100 COSC and the Sternglas Naos XS Automatik uses the Miyota 6T15.

Side by side

Serica Ref. 5303 Diving ChronometervsSternglas Naos XS Automatik

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

Sternglas Naos XS Automatik

naos-xs-automatik-gold

MSRP $431

At a glance

14 of 29 specs differ

Diameter

Ref. 5303 Diving Chronometer39mm

Naos XS Automatik33mm

Power Reserve

Ref. 5303 Diving Chronometer42h

Naos XS Automatik—

Water Resistance

Ref. 5303 Diving Chronometer300m

Naos XS Automatik50m

MSRP

Ref. 5303 Diving Chronometer$1,768

Naos XS Automatik$431

Full specifications

Case

6 specs

Crystal & Dial

3 specs

AR Coating

Yes

Inner

Dial Color

Enamel Black

—

Lume

Super-LumiNova

None

Movement

4 specs

Caliber

M100 COSC

Miyota 6T15

Power Reserve

42h

—

Jewels

—

Complications

COSC

None

Pricing

1 specs

MSRP

$1,768

$431

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