Which is cheaper, the Decima Scylla or the Seiko Prospex SPEEDTIMER Mechanical?

At MSRP the Decima Scylla is the cheaper of the two at $899, against $995 for the Seiko Prospex SPEEDTIMER Mechanical — a $96 gap before any retailer discounting.

Which is bigger, the Decima Scylla or the Seiko Prospex SPEEDTIMER Mechanical?

The Decima Scylla wears larger at 44mm versus 39.5mm for the Seiko Prospex SPEEDTIMER Mechanical — a 4.5mm difference across the dial.

Which has better water resistance, the Decima Scylla or the Seiko Prospex SPEEDTIMER Mechanical?

The Decima Scylla is rated to 500m versus 20m for the Seiko Prospex SPEEDTIMER Mechanical.

Which has a longer power reserve, the Decima Scylla or the Seiko Prospex SPEEDTIMER Mechanical?

The Seiko Prospex SPEEDTIMER Mechanical carries a 72-hour power reserve against 38 hours on the Decima Scylla.

What movement does the Decima Scylla run compared to the Seiko Prospex SPEEDTIMER Mechanical?

Both watches run automatic movements — the Decima Scylla uses the Sellita SW200-1 and the Seiko Prospex SPEEDTIMER Mechanical uses the 6R55.

Side by side

Decima ScyllavsSeiko Prospex SPEEDTIMER Mechanical

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

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Decima Scylla

scylla-green

MSRP $899

Seiko Prospex SPEEDTIMER Mechanical

spb513j1

MSRP $995

At a glance

15 of 29 specs differ

Diameter

Scylla44mm

Prospex SPEEDTIMER Mechanical39.5mm

Power Reserve

Scylla38h

Prospex SPEEDTIMER Mechanical72h

Water Resistance

Scylla500m

Prospex SPEEDTIMER Mechanical200m

MSRP

Scylla$899

Prospex SPEEDTIMER Mechanical$995

Full specifications

Case

7 specs

Crystal & Dial

4 specs

Crystal Shape

Flat

Curved

AR Coating

Inner

Anti-reflective coating on inner surface

Dial Color

Green

Black

Lume

SuperLuminova

LumiBrite on hands and index(es)

Movement

3 specs

Caliber

Sellita SW200-1

6R55

Power Reserve

38h

72h

Jewels

Pricing

1 specs

MSRP

$899

$995

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Decima ScyllavsSeiko Prospex SPEEDTIMER Mechanical

At a glance

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