Which is cheaper, the Sheffield 1A or the Seiko Prospex LX line?

At MSRP the Sheffield 1A is the cheaper of the two at $223, against $5,500 for the Seiko Prospex LX line — a $5,277 gap before any retailer discounting.

Which is bigger, the Sheffield 1A or the Seiko Prospex LX line?

The Seiko Prospex LX line wears larger at 44.8mm versus 40mm for the Sheffield 1A — a 4.8mm difference across the dial.

Which has better water resistance, the Sheffield 1A or the Seiko Prospex LX line?

The Sheffield 1A is rated to 200m versus 20m for the Seiko Prospex LX line.

What movement does the Sheffield 1A run compared to the Seiko Prospex LX line?

The Sheffield 1A runs a automatic caliber (Seiko NH35A), while the Seiko Prospex LX line runs a spring drive (5R66).

Side by side

Sheffield 1AvsSeiko Prospex LX line

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

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Sheffield 1A

diver-1a-40mm-white

MSRP $223

Seiko Prospex LX line

snr025j1

MSRP $5,500

At a glance

14 of 29 specs differ

Diameter

1A40mm

Prospex LX line44.8mm

Power Reserve

1A—

Prospex LX line72h

Water Resistance

1A200m

Prospex LX line200m

MSRP

1A$223

Prospex LX line$5,500

Full specifications

Case

6 specs

Crystal & Dial

3 specs

AR Coating

Inner

Super-clear coating

Dial Color

White/Blue

Black

Lume

Swiss blue lume

LumiBrite on hands and index(es)

Movement

4 specs

Caliber

Seiko NH35A

5R66

Type

Automatic

Spring Drive

Power Reserve

—

72h

Jewels

Pricing

1 specs

MSRP

$223

$5,500

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Sheffield 1AvsSeiko Prospex LX line

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