Which is cheaper, the Ralf Tech WRB AUTOMATIC METAL or the Seiko Prospex SPEEDTIMER Mechanical?

At MSRP the Seiko Prospex SPEEDTIMER Mechanical is the cheaper of the two at $995, against $2,290 for the Ralf Tech WRB AUTOMATIC METAL — a $1,295 gap before any retailer discounting.

Which is bigger, the Ralf Tech WRB AUTOMATIC METAL or the Seiko Prospex SPEEDTIMER Mechanical?

The Seiko Prospex SPEEDTIMER Mechanical wears larger at 39.5mm versus 39mm for the Ralf Tech WRB AUTOMATIC METAL — a 0.5mm difference across the dial.

Which has better water resistance, the Ralf Tech WRB AUTOMATIC METAL or the Seiko Prospex SPEEDTIMER Mechanical?

The Ralf Tech WRB AUTOMATIC METAL is rated to 200m versus 20m for the Seiko Prospex SPEEDTIMER Mechanical.

Which has a longer power reserve, the Ralf Tech WRB AUTOMATIC METAL or the Seiko Prospex SPEEDTIMER Mechanical?

The Seiko Prospex SPEEDTIMER Mechanical carries a 72-hour power reserve against 40 hours hours on the Ralf Tech WRB AUTOMATIC METAL.

What movement does the Ralf Tech WRB AUTOMATIC METAL run compared to the Seiko Prospex SPEEDTIMER Mechanical?

Both watches run automatic movements — the Ralf Tech WRB AUTOMATIC METAL uses the RTA003 and the Seiko Prospex SPEEDTIMER Mechanical uses the 6R55.

Side by side

Ralf Tech WRB AUTOMATIC METALvsSeiko Prospex SPEEDTIMER Mechanical

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

Add a watch

Ralf Tech WRB AUTOMATIC METAL

wrb-automatic-california-metal

MSRP $2,290

Seiko Prospex SPEEDTIMER Mechanical

spb513j1

MSRP $995

At a glance

10 of 29 specs differ

Diameter

WRB AUTOMATIC METAL39mm

Prospex SPEEDTIMER Mechanical39.5mm

Power Reserve

WRB AUTOMATIC METAL40 hoursh

Prospex SPEEDTIMER Mechanical72h

Water Resistance

WRB AUTOMATIC METAL200m

Prospex SPEEDTIMER Mechanical200m

MSRP

WRB AUTOMATIC METAL$2,290

Prospex SPEEDTIMER Mechanical$995

Full specifications

Case

3 specs

Crystal & Dial

3 specs

Crystal Shape

Flat

Curved

AR Coating

Inner

Anti-reflective coating on inner surface

Lume

None

LumiBrite on hands and index(es)

Movement

3 specs

Caliber

RTA003

6R55

Power Reserve

40 hoursh

72h

Jewels

Pricing

1 specs

MSRP

$2,290

$995

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ACADÉMIE AUTOMATIC WRB dive 41mm 3-hand (serrated 60-min rotating dive bezel, crown @4 with guards)

8 variantsRef.

41mm·Automatic·200m WR

$2,080MSRP

—Used

Yemamicro

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Ralf Tech WRB AUTOMATIC METALvsSeiko Prospex SPEEDTIMER Mechanical

At a glance

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