Which is cheaper, the Serica Ref. 5303 Diving Chronometer or the Hemel Sky Racer Mechanical?

At MSRP the Hemel Sky Racer Mechanical is the cheaper of the two at $550, against $1,768 for the Serica Ref. 5303 Diving Chronometer — a $1,218 gap before any retailer discounting.

Which is bigger, the Serica Ref. 5303 Diving Chronometer or the Hemel Sky Racer Mechanical?

The Hemel Sky Racer Mechanical wears larger at 43mm versus 39mm for the Serica Ref. 5303 Diving Chronometer — a 4mm difference across the dial.

Which has better water resistance, the Serica Ref. 5303 Diving Chronometer or the Hemel Sky Racer Mechanical?

The Serica Ref. 5303 Diving Chronometer is rated to 300m versus 50m for the Hemel Sky Racer Mechanical.

Which has a longer power reserve, the Serica Ref. 5303 Diving Chronometer or the Hemel Sky Racer Mechanical?

The Serica Ref. 5303 Diving Chronometer carries a 42-hour power reserve against 40 hours on the Hemel Sky Racer Mechanical.

What movement does the Serica Ref. 5303 Diving Chronometer run compared to the Hemel Sky Racer Mechanical?

The Serica Ref. 5303 Diving Chronometer runs a automatic caliber (M100 COSC), while the Hemel Sky Racer Mechanical runs a manual (Seagull ST19).

Side by side

Serica Ref. 5303 Diving ChronometervsHemel Sky Racer Mechanical

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

Hemel Sky Racer Mechanical

HF37MNB

MSRP $550

At a glance

15 of 29 specs differ

Diameter

Ref. 5303 Diving Chronometer39mm

Sky Racer Mechanical43mm

Power Reserve

Ref. 5303 Diving Chronometer42h

Sky Racer Mechanical40h

Water Resistance

Ref. 5303 Diving Chronometer300m

Sky Racer Mechanical50m

MSRP

Ref. 5303 Diving Chronometer$1,768

Sky Racer Mechanical$550

Full specifications

Case

6 specs

Crystal & Dial

4 specs

Crystal

Sapphire

Domed Sapphire

AR Coating

Yes

Inner

Dial Color

Enamel Black

Black

Lume

Super-LumiNova

None

Movement

4 specs

Caliber

M100 COSC

Seagull ST19

Type

Automatic

Manual

Power Reserve

42h

40h

Complications

COSC

None

Pricing

1 specs

MSRP

$1,768

$550

Follow this matchup

Get a note when Serica Ref. 5303 Diving Chronometer vs Hemel Sky Racer Mechanical gets more votes, a community discussion, or a price drop. No account needed.

Keep exploring