Which is cheaper, the Sheffield Deep Gray 300 or the Seiko Prospex Sea Save the Ocean Special Edition?

At MSRP the Sheffield Deep Gray 300 is the cheaper of the two at $258, against $625 for the Seiko Prospex Sea Save the Ocean Special Edition — a $367 gap before any retailer discounting.

Which is bigger, the Sheffield Deep Gray 300 or the Seiko Prospex Sea Save the Ocean Special Edition?

The Seiko Prospex Sea Save the Ocean Special Edition wears larger at 45mm versus 42mm for the Sheffield Deep Gray 300 — a 3mm difference across the dial.

Which has better water resistance, the Sheffield Deep Gray 300 or the Seiko Prospex Sea Save the Ocean Special Edition?

The Sheffield Deep Gray 300 is rated to 300m versus 200m for the Seiko Prospex Sea Save the Ocean Special Edition.

Which has a longer power reserve, the Sheffield Deep Gray 300 or the Seiko Prospex Sea Save the Ocean Special Edition?

The Seiko Prospex Sea Save the Ocean Special Edition carries a 41-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 Sea Save the Ocean Special Edition?

Both watches run automatic movements — the Sheffield Deep Gray 300 uses the Seiko NH35 and the Seiko Prospex Sea Save the Ocean Special Edition uses the 4R36.

Side by side

Sheffield Deep Gray 300vsSeiko Prospex Sea Save the Ocean Special Edition

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

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Sheffield Deep Gray 300

deep-gray-300

MSRP $258

Seiko Prospex Sea Save the Ocean Special Edition

srpf77

MSRP $625

At a glance

12 of 29 specs differ

Diameter

Deep Gray 30042mm

Prospex Sea Save the Ocean Special Edition45mm

Power Reserve

Deep Gray 30040h

Prospex Sea Save the Ocean Special Edition41h

Water Resistance

Deep Gray 300300m

Prospex Sea Save the Ocean Special Edition200m

MSRP

Deep Gray 300$258

Prospex Sea Save the Ocean Special Edition$625

Full specifications

Case

5 specs

Crystal & Dial

3 specs

AR Coating

Inner

Anti-reflective coating on inner surface

Dial Color

—

Black

Lume

None

LumiBrite on hands, index(es) and bezel

Movement

3 specs

Caliber

Seiko NH35

4R36

Power Reserve

40h

41h

Jewels

Pricing

1 specs

MSRP

—

$625

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Sheffield Deep Gray 300vsSeiko Prospex Sea Save the Ocean Special Edition

At a glance

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