Which is cheaper, the Seiko Prospex SPEEDTIMER Mechanical or the Vaer D4 Outerknown Solar Diver?

At MSRP the Vaer D4 Outerknown Solar Diver is the cheaper of the two at $549, against $995 for the Seiko Prospex SPEEDTIMER Mechanical — a $446 gap before any retailer discounting.

Which is bigger, the Seiko Prospex SPEEDTIMER Mechanical or the Vaer D4 Outerknown Solar Diver?

The Seiko Prospex SPEEDTIMER Mechanical wears larger at 39.5mm versus 39mm for the Vaer D4 Outerknown Solar Diver — a 0.5mm difference across the dial.

Which has better water resistance, the Seiko Prospex SPEEDTIMER Mechanical or the Vaer D4 Outerknown Solar Diver?

The Vaer D4 Outerknown Solar Diver is rated to 200m versus 20m for the Seiko Prospex SPEEDTIMER Mechanical.

Which has a longer power reserve, the Seiko Prospex SPEEDTIMER Mechanical or the Vaer D4 Outerknown Solar Diver?

The Seiko Prospex SPEEDTIMER Mechanical carries a 72-hour power reserve against 40 hours on the Vaer D4 Outerknown Solar Diver.

What movement does the Seiko Prospex SPEEDTIMER Mechanical run compared to the Vaer D4 Outerknown Solar Diver?

The Seiko Prospex SPEEDTIMER Mechanical runs a automatic caliber (6R55), while the Vaer D4 Outerknown Solar Diver runs a quartz.

Side by side

Seiko Prospex SPEEDTIMER MechanicalvsVaer D4 Outerknown Solar Diver

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

Seiko Prospex SPEEDTIMER Mechanical

spb513j1

MSRP $995

Vaer D4 Outerknown Solar Diver

d4-outerknown-usa-solar-diver-marine

MSRP $549

At a glance

15 of 29 specs differ

Diameter

Prospex SPEEDTIMER Mechanical39.5mm

D4 Outerknown Solar Diver39mm

Power Reserve

Prospex SPEEDTIMER Mechanical72h

D4 Outerknown Solar Diver40h

Water Resistance

Prospex SPEEDTIMER Mechanical200m

D4 Outerknown Solar Diver200m

MSRP

Prospex SPEEDTIMER Mechanical$995

D4 Outerknown Solar Diver$549

Full specifications

Case

5 specs

Crystal & Dial

5 specs

Crystal

Sapphire

Domed Sapphire

Crystal Shape

Curved

Flat

AR Coating

Anti-reflective coating on inner surface

Inner

Dial Color

Black

Blue

Lume

LumiBrite on hands and index(es)

None

Movement

4 specs

Caliber

6R55

—

Type

Automatic

Quartz

Power Reserve

72h

40h

Jewels

Pricing

1 specs

MSRP

$995

$549

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