Which is cheaper, the Sheffield 1A SCR II Blue or the Seiko Prospex Sea?

At MSRP the Sheffield 1A SCR II Blue is the cheaper of the two at $278, against $625 for the Seiko Prospex Sea — a $347 gap before any retailer discounting.

Which is bigger, the Sheffield 1A SCR II Blue or the Seiko Prospex Sea?

The Seiko Prospex Sea wears larger at 43.8mm versus 40mm for the Sheffield 1A SCR II Blue — a 3.8mm difference across the dial.

Which has a longer power reserve, the Sheffield 1A SCR II Blue or the Seiko Prospex Sea?

The Seiko Prospex Sea carries a 41-hour power reserve against 40 hours on the Sheffield 1A SCR II Blue.

What movement does the Sheffield 1A SCR II Blue run compared to the Seiko Prospex Sea?

Both watches run automatic movements — the Sheffield 1A SCR II Blue uses the Seiko NH35 and the Seiko Prospex Sea uses the 4R35.

Side by side

Sheffield 1A SCR II BluevsSeiko Prospex Sea

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

Add a watch

Sheffield 1A SCR II Blue

1a-scr-ii-blue

MSRP $278

Seiko Prospex Sea

srpe37

MSRP $625

At a glance

12 of 29 specs differ

Diameter

1A SCR II Blue40mm

Prospex Sea43.8mm

Power Reserve

1A SCR II Blue40h

Prospex Sea41h

Water Resistance

1A SCR II Blue200m

Prospex Sea200m

MSRP

1A SCR II Blue$278

Prospex Sea$625

Full specifications

Case

5 specs

Crystal & Dial

3 specs

AR Coating

Inner

Anti-reflective coating on inner surface

Dial Color

Blue

Black

Lume

None

LumiBrite on hands, index(es) and bezel

Movement

3 specs

Caliber

Seiko NH35

4R35

Power Reserve

40h

41h

Jewels

Pricing

1 specs

MSRP

—

$625

Keep exploring

More watches worth a look

Matched to the watches above on size, movement, style and price — microbrands first. Open any one to dig in.

Filippo Loreti Watchesmicro

Joker

Follow this matchup

Get a note when Sheffield 1A SCR II Blue vs Seiko Prospex Sea gets more votes, a community discussion, or a price drop. No account needed.

Adjacent matchups

People also compared

Comparisons nearby in the catalog — alternatives to the watches above paired against the matchup.

Sheffield 1A 40mmvsSeiko Prospex Sea Sheffield 1A 38 dive 38mm, 3-hand date (rotating dive bezel, perforated rubber strap)vsSeiko Prospex Sea Sheffield 1A 38vsSeiko Prospex Sea Filippo Loreti Watches The Joker MadnessvsSeiko Prospex Sea Borealis Watch Co. JamantavsSheffield 1A SCR II Blue Spinnaker PopeyevsSheffield 1A SCR II Blue

Edit this comparison Add another watch Explore more 39–45mm watches

Sheffield 1A SCR II BluevsSeiko Prospex Sea

At a glance

Full specifications

More watches worth a look

The Joker Madness

Jamanta

Aquadiver

Popeye

Barracuda

COURG: Zero-Hour

COURG: Minimalist

Great White 43

Follow this matchup

People also compared