Which is cheaper, the Serica Ref. 5330 Diving Chronometer Date or the Seiko Prospex Sea?

At MSRP the Seiko Prospex Sea is the cheaper of the two at $1,100, against $2,005 for the Serica Ref. 5330 Diving Chronometer Date — a $905 gap before any retailer discounting.

Which is bigger, the Serica Ref. 5330 Diving Chronometer Date or the Seiko Prospex Sea?

The Seiko Prospex Sea wears larger at 41.3mm versus 39mm for the Serica Ref. 5330 Diving Chronometer Date — a 2.3mm difference across the dial.

Which has a longer power reserve, the Serica Ref. 5330 Diving Chronometer Date or the Seiko Prospex Sea?

The Seiko Prospex Sea carries a 72-hour power reserve against 42 hours on the Serica Ref. 5330 Diving Chronometer Date.

What movement does the Serica Ref. 5330 Diving Chronometer Date run compared to the Seiko Prospex Sea?

Both watches run automatic movements — the Serica Ref. 5330 Diving Chronometer Date uses the SoProd M100 and the Seiko Prospex Sea uses the 6R55.

Side by side

Serica Ref. 5330 Diving Chronometer DatevsSeiko Prospex Sea

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

Serica Ref. 5330 Diving Chronometer Date

5330-chronometre-plongee-date

MSRP $2,005

Seiko Prospex Sea

spb481j1

MSRP $1,100

At a glance

10 of 29 specs differ

Diameter

Ref. 5330 Diving Chronometer Date39mm

Prospex Sea41.3mm

Power Reserve

Ref. 5330 Diving Chronometer Date42h

Prospex Sea72h

Water Resistance

Ref. 5330 Diving Chronometer Date300m

Prospex Sea300m

MSRP

Ref. 5330 Diving Chronometer Date$2,005

Prospex Sea$1,100

Full specifications

Case

3 specs

Diameter

39mm

41.3mm

Thickness

12.2mm

12.5mm

Lug-to-Lug

46.5mm

48.2mm

Crystal & Dial

2 specs

AR Coating

Yes

Anti-reflective coating on inner surface

Lume

Super-LumiNova

LumiBrite on hands, index(es) and bezel

Movement

4 specs

Caliber

SoProd M100

6R55

Power Reserve

42h

72h

Jewels

Complications

COSC, Date

None

Pricing

1 specs

MSRP

$2,005

$1,100

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