Which is cheaper, the Serica Ref. 5303 Diving Chronometer or the Grand Seiko SBGK006?

At MSRP the Serica Ref. 5303 Diving Chronometer is the cheaper of the two at $1,768, against $22,200 for the Grand Seiko SBGK006 — a $20,432 gap before any retailer discounting.

Which has better water resistance, the Serica Ref. 5303 Diving Chronometer or the Grand Seiko SBGK006?

The Serica Ref. 5303 Diving Chronometer is rated to 300m versus 30m for the Grand Seiko SBGK006.

Which has a longer power reserve, the Serica Ref. 5303 Diving Chronometer or the Grand Seiko SBGK006?

The Grand Seiko SBGK006 carries a 72-hour power reserve against 42 hours on the Serica Ref. 5303 Diving Chronometer.

What movement does the Serica Ref. 5303 Diving Chronometer run compared to the Grand Seiko SBGK006?

The Serica Ref. 5303 Diving Chronometer runs a automatic caliber (M100 COSC), while the Grand Seiko SBGK006 runs a manual (9S63).

Side by side

Serica Ref. 5303 Diving ChronometervsGrand Seiko SBGK006

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

Grand Seiko SBGK006

sbgk006j

MSRP $22,200

At a glance

13 of 29 specs differ

Diameter

Ref. 5303 Diving Chronometer39mm

SBGK00639mm

Power Reserve

Ref. 5303 Diving Chronometer42h

SBGK00672h

Water Resistance

Ref. 5303 Diving Chronometer300m

SBGK00630m

MSRP

Ref. 5303 Diving Chronometer$1,768

SBGK006$22,200

Full specifications

Case

6 specs

Crystal & Dial

2 specs

Dial Color

Enamel Black

Black

Lume

Super-LumiNova

None

Movement

4 specs

Caliber

M100 COSC

9S63

Type

Automatic

Manual

Power Reserve

42h

72h

Complications

COSC

None

Pricing

1 specs

MSRP

$1,768

$22,200

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