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

At MSRP the Seiko Prospex SPEEDTIMER Mechanical is the cheaper of the two at $995, against $2,005 for the Serica Ref. 5330 Diving Chronometer Date — a $1,010 gap before any retailer discounting.

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

The Seiko Prospex SPEEDTIMER Mechanical wears larger at 39.5mm versus 39mm for the Serica Ref. 5330 Diving Chronometer Date — a 0.5mm difference across the dial.

Which has better water resistance, the Serica Ref. 5330 Diving Chronometer Date or the Seiko Prospex SPEEDTIMER Mechanical?

The Serica Ref. 5330 Diving Chronometer Date is rated to 300m versus 20m for the Seiko Prospex SPEEDTIMER Mechanical.

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

The Seiko Prospex SPEEDTIMER Mechanical 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 SPEEDTIMER Mechanical?

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

Side by side

Serica Ref. 5330 Diving Chronometer DatevsSeiko Prospex SPEEDTIMER Mechanical

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 SPEEDTIMER Mechanical

spb513j1

MSRP $995

At a glance

13 of 29 specs differ

Diameter

Ref. 5330 Diving Chronometer Date39mm

Prospex SPEEDTIMER Mechanical39.5mm

Power Reserve

Ref. 5330 Diving Chronometer Date42h

Prospex SPEEDTIMER Mechanical72h

Water Resistance

Ref. 5330 Diving Chronometer Date300m

Prospex SPEEDTIMER Mechanical200m

MSRP

Ref. 5330 Diving Chronometer Date$2,005

Prospex SPEEDTIMER Mechanical$995

Full specifications

Case

5 specs

Crystal & Dial

3 specs

Crystal Shape

Flat

Curved

AR Coating

Yes

Anti-reflective coating on inner surface

Lume

Super-LumiNova

LumiBrite on hands and index(es)

Movement

4 specs

Caliber

SoProd M100

6R55

Power Reserve

42h

72h

Jewels

Complications

COSC, Date

None

Pricing

1 specs

MSRP

$2,005

$995

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