Which is cheaper, the Serica Ref. 5303 Diving Chronometer or the Helgray Kensington Quartz?

At MSRP the Helgray Kensington Quartz is the cheaper of the two at $299, against $1,768 for the Serica Ref. 5303 Diving Chronometer — a $1,469 gap before any retailer discounting.

Which is bigger, the Serica Ref. 5303 Diving Chronometer or the Helgray Kensington Quartz?

The Serica Ref. 5303 Diving Chronometer wears larger at 39mm versus 38mm for the Helgray Kensington Quartz — a 1mm difference across the dial.

Which has better water resistance, the Serica Ref. 5303 Diving Chronometer or the Helgray Kensington Quartz?

The Serica Ref. 5303 Diving Chronometer is rated to 300m versus 50m for the Helgray Kensington Quartz.

Which has a longer power reserve, the Serica Ref. 5303 Diving Chronometer or the Helgray Kensington Quartz?

The Serica Ref. 5303 Diving Chronometer carries a 42-hour power reserve against 40 hours on the Helgray Kensington Quartz.

What movement does the Serica Ref. 5303 Diving Chronometer run compared to the Helgray Kensington Quartz?

The Serica Ref. 5303 Diving Chronometer runs a automatic caliber (M100 COSC), while the Helgray Kensington Quartz runs a quartz (Miyota GL22).

Side by side

Serica Ref. 5303 Diving ChronometervsHelgray Kensington Quartz

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

Helgray Kensington Quartz

kensington

MSRP $299

At a glance

13 of 29 specs differ

Diameter

Ref. 5303 Diving Chronometer39mm

Kensington Quartz38mm

Power Reserve

Ref. 5303 Diving Chronometer42h

Kensington Quartz40h

Water Resistance

Ref. 5303 Diving Chronometer300m

Kensington Quartz50m

MSRP

Ref. 5303 Diving Chronometer$1,768

Kensington Quartz$299

Full specifications

Case

5 specs

Crystal & Dial

3 specs

AR Coating

Yes

Inner

Dial Color

Enamel Black

Black

Lume

Super-LumiNova

Yes

Movement

4 specs

Caliber

M100 COSC

Miyota GL22

Type

Automatic

Quartz

Power Reserve

42h

40h

Complications

COSC

None

Pricing

1 specs

MSRP

$1,768

$299

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