Which is bigger, the Sheffield SUPERPRODUCTION or the Seiko Prospex Land Mechanical?

The Sheffield SUPERPRODUCTION wears larger at 40mm versus 39.5mm for the Seiko Prospex Land Mechanical — a 0.5mm difference across the dial.

Which has better water resistance, the Sheffield SUPERPRODUCTION or the Seiko Prospex Land Mechanical?

The Sheffield SUPERPRODUCTION is rated to 200m versus 20m for the Seiko Prospex Land Mechanical.

Which has a longer power reserve, the Sheffield SUPERPRODUCTION or the Seiko Prospex Land Mechanical?

The Seiko Prospex Land Mechanical carries a 72-hour power reserve against 38 hours on the Sheffield SUPERPRODUCTION.

What movement does the Sheffield SUPERPRODUCTION run compared to the Seiko Prospex Land Mechanical?

Both watches run automatic movements — the Sheffield SUPERPRODUCTION uses the Sellita SW200-1 and the Seiko Prospex Land Mechanical uses the 6R55.

Side by side

Sheffield SUPERPRODUCTIONvsSeiko Prospex Land Mechanical

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

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Sheffield SUPERPRODUCTION

superproduction

Seiko Prospex Land Mechanical

spb503j1

MSRP $995

At a glance

11 of 29 specs differ

Diameter

SUPERPRODUCTION40mm

Prospex Land Mechanical39.5mm

Power Reserve

SUPERPRODUCTION38h

Prospex Land Mechanical72h

Water Resistance

SUPERPRODUCTION200m

Prospex Land Mechanical200m

MSRP

SUPERPRODUCTION—

Prospex Land Mechanical$995

Full specifications

Case

4 specs

Crystal & Dial

3 specs

AR Coating

Inner

Anti-reflective coating on inner surface

Dial Color

Blue Graphite

Black

Lume

Swiss Lume

LumiBrite on hands and index(es)

Movement

3 specs

Caliber

Sellita SW200-1

6R55

Power Reserve

38h

72h

Jewels

Pricing

1 specs

MSRP

—

$995

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Sheffield SUPERPRODUCTIONvsSeiko Prospex Land Mechanical

At a glance

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