Which is cheaper, the Sheffield Deep Gray 300 or the Seiko Prospex Land Mechanical GMT?

At MSRP the Sheffield Deep Gray 300 is the cheaper of the two at $258, against $1,150 for the Seiko Prospex Land Mechanical GMT — a $892 gap before any retailer discounting.

Which is bigger, the Sheffield Deep Gray 300 or the Seiko Prospex Land Mechanical GMT?

The Sheffield Deep Gray 300 wears larger at 42mm versus 39.5mm for the Seiko Prospex Land Mechanical GMT — a 2.5mm difference across the dial.

Which has better water resistance, the Sheffield Deep Gray 300 or the Seiko Prospex Land Mechanical GMT?

The Sheffield Deep Gray 300 is rated to 300m versus 20m for the Seiko Prospex Land Mechanical GMT.

Which has a longer power reserve, the Sheffield Deep Gray 300 or the Seiko Prospex Land Mechanical GMT?

The Seiko Prospex Land Mechanical GMT carries a 72-hour power reserve against 40 hours on the Sheffield Deep Gray 300.

What movement does the Sheffield Deep Gray 300 run compared to the Seiko Prospex Land Mechanical GMT?

Both watches run automatic movements — the Sheffield Deep Gray 300 uses the Seiko NH35 and the Seiko Prospex Land Mechanical GMT uses the 6R54.

Side by side

Sheffield Deep Gray 300vsSeiko Prospex Land Mechanical GMT

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

Add a watch

Sheffield Deep Gray 300

deep-gray-300

MSRP $258

Seiko Prospex Land Mechanical GMT

spb377j1

MSRP $1,150

At a glance

14 of 29 specs differ

Diameter

Deep Gray 30042mm

Prospex Land Mechanical GMT39.5mm

Power Reserve

Deep Gray 30040h

Prospex Land Mechanical GMT72h

Water Resistance

Deep Gray 300300m

Prospex Land Mechanical GMT200m

MSRP

Deep Gray 300$258

Prospex Land Mechanical GMT$1,150

Full specifications

Case

6 specs

Crystal & Dial

4 specs

Crystal Shape

Flat

Curved

AR Coating

Inner

Anti-reflective coating on inner surface

Dial Color

—

Black

Lume

None

LumiBrite on hands and index(es)

Movement

3 specs

Caliber

Seiko NH35

6R54

Power Reserve

40h

72h

Jewels

Pricing

1 specs

MSRP

—

$1,150

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Sheffield Deep Gray 300vsSeiko Prospex Land Mechanical GMT

At a glance

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