Which is cheaper, the Sheffield 1A 40mm or the Seiko Prospex Sea Save the Ocean Special Edition?

At MSRP the Sheffield 1A 40mm is the cheaper of the two at $228, against $625 for the Seiko Prospex Sea Save the Ocean Special Edition — a $397 gap before any retailer discounting.

Which is bigger, the Sheffield 1A 40mm or the Seiko Prospex Sea Save the Ocean Special Edition?

The Seiko Prospex Sea Save the Ocean Special Edition wears larger at 45mm versus 40mm for the Sheffield 1A 40mm — a 5mm difference across the dial.

Which has a longer power reserve, the Sheffield 1A 40mm 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 1A 40mm.

What movement does the Sheffield 1A 40mm run compared to the Seiko Prospex Sea Save the Ocean Special Edition?

Both watches run automatic movements — the Sheffield 1A 40mm uses the Seiko NH35 and the Seiko Prospex Sea Save the Ocean Special Edition uses the 4R36.

Side by side

Sheffield 1A 40mmvsSeiko Prospex Sea Save the Ocean Special Edition

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

Add a watch

Sheffield 1A 40mm

allsport-1-auto

MSRP $228

See the full 1A 40mm

Seiko Prospex Sea Save the Ocean Special Edition

srpf77

MSRP $625

See the full Prospex Sea Save the Ocean Special Edition

At a glance

12 of 29 specs differ

Diameter

1A 40mm40mm

Prospex Sea Save the Ocean Special Edition45mm

Power Reserve

1A 40mm40h

Prospex Sea Save the Ocean Special Edition41h

Water Resistance

1A 40mm200m

Prospex Sea Save the Ocean Special Edition200m

MSRP

1A 40mm$228

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

$228

$625

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Sheffield 1A 40mmvsSeiko Prospex Sea Save the Ocean Special Edition

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