Which is bigger, the Arcanaut ARC II or the Seiko Prospex Sea?

The Seiko Prospex Sea wears larger at 41mm versus 40.52mm for the Arcanaut ARC II — a 0.5mm difference across the dial.

Which has better water resistance, the Arcanaut ARC II or the Seiko Prospex Sea?

The Seiko Prospex Sea is rated to 200m versus 100m for the Arcanaut ARC II.

Which has a longer power reserve, the Arcanaut ARC II or the Seiko Prospex Sea?

The Seiko Prospex Sea carries a 70-hour power reserve against 42 hours on the Arcanaut ARC II.

What movement does the Arcanaut ARC II run compared to the Seiko Prospex Sea?

Both watches run automatic movements — the Arcanaut ARC II uses the Soprod and the Seiko Prospex Sea uses the 6R35.

Side by side

Arcanaut ARC IIvsSeiko Prospex Sea

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

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Arcanaut ARC II

arc-ii-fordite-groovy-st-james-pride

Seiko Prospex Sea

spb317j1

MSRP $900

At a glance

14 of 29 specs differ

Diameter

ARC II40.52mm

Prospex Sea41mm

Power Reserve

ARC II42h

Prospex Sea70h

Water Resistance

ARC II100m

Prospex Sea200m

MSRP

ARC II—

Prospex Sea$900

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

Cyber Cyan Lumicast

LumiBrite on hands, index(es) and bezel

Movement

3 specs

Caliber

Soprod

6R35

Power Reserve

42h

70h

Jewels

Pricing

1 specs

MSRP

—

$900

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Arcanaut ARC IIvsSeiko Prospex Sea

At a glance

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