Which is cheaper, the Seiko Prospex SPEEDTIMER Mechanical Chronograph or the Zero West L4 Longitude?

At MSRP the Seiko Prospex SPEEDTIMER Mechanical Chronograph is the cheaper of the two at $2,500, against $2,995 for the Zero West L4 Longitude — a $495 gap before any retailer discounting.

Which has better water resistance, the Seiko Prospex SPEEDTIMER Mechanical Chronograph or the Zero West L4 Longitude?

The Zero West L4 Longitude is rated to 100m versus 10m for the Seiko Prospex SPEEDTIMER Mechanical Chronograph.

Which has a longer power reserve, the Seiko Prospex SPEEDTIMER Mechanical Chronograph or the Zero West L4 Longitude?

The Zero West L4 Longitude carries a 62-hour power reserve against 45 hours on the Seiko Prospex SPEEDTIMER Mechanical Chronograph.

What movement does the Seiko Prospex SPEEDTIMER Mechanical Chronograph run compared to the Zero West L4 Longitude?

Both watches run automatic movements — the Seiko Prospex SPEEDTIMER Mechanical Chronograph uses the 8R48 and the Zero West L4 Longitude uses the Sellita SW500.

Side by side

Seiko Prospex SPEEDTIMER Mechanical ChronographvsZero West L4 Longitude

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

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Seiko Prospex SPEEDTIMER Mechanical Chronograph

MSRP $2,500

See the full Prospex SPEEDTIMER Mechanical Chronograph

Zero West L4 Longitude

MSRP $2,995

See the full L4 Longitude

At a glance

12 of 29 specs differ

Diameter

Prospex SPEEDTIMER Mechanical Chronograph42mm

L4 Longitude42mm

Power Reserve

Prospex SPEEDTIMER Mechanical Chronograph45h

L4 Longitude62h

Water Resistance

Prospex SPEEDTIMER Mechanical Chronograph100m

L4 Longitude100m

MSRP

Prospex SPEEDTIMER Mechanical Chronograph$2,500

L4 Longitude$2,995

Full specifications

Case

4 specs

Crystal & Dial

4 specs

Crystal Shape

Curved

—

AR Coating

Anti-reflective coating on inner surface

—

Dial Color

—

Lume

LumiBrite on hands and index(es)

None

Movement

3 specs

Caliber

8R48

Sellita SW500

Power Reserve

45h

62h

Jewels

Pricing

1 specs

MSRP

$2,500

$2,995

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Seiko Prospex SPEEDTIMER Mechanical ChronographvsZero West L4 Longitude

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