Which is bigger, the Seiko Prospex Sea or the William Wood Valiant No-Date?

The Seiko Prospex Sea wears larger at 42mm versus 41mm for the William Wood Valiant No-Date — a 1mm difference across the dial.

Which has better water resistance, the Seiko Prospex Sea or the William Wood Valiant No-Date?

The Seiko Prospex Sea is rated to 300m versus 100m for the William Wood Valiant No-Date.

What movement does the Seiko Prospex Sea run compared to the William Wood Valiant No-Date?

Both watches run automatic movements — the Seiko Prospex Sea uses the Seiko 6R54 and the William Wood Valiant No-Date uses the Seiko NH35.

Side by side

Seiko Prospex SeavsWilliam Wood Valiant No-Date

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

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Seiko Prospex Sea

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William Wood Valiant No-Date

MSRP $1,100

See the full Valiant No-Date

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At a glance

13 of 29 specs differ

Diameter

Prospex Sea42mm

Valiant No-Date41mm

Power Reserve

Prospex Sea72h

Valiant No-Date—

Water Resistance

Prospex Sea300m

Valiant No-Date100m

MSRP

Prospex Sea—

Valiant No-Date$1,100

Full specifications

Case

5 specs

Diameter

42mm

41mm

Thickness

13.3mm

15mm

Lug-to-Lug

48.6mm

49mm

Material

Stainless Steel

316L Stainless Steel

Water Resistance

300m

100m

Crystal & Dial

4 specs

Crystal

Sapphire

Domed Sapphire

AR Coating

Anti-reflective coating on inner surface

—

Dial Color

—

Black

Lume

LumiBrite on hands, index(es) and bezel

None

Movement

3 specs

Caliber

Seiko 6R54

Seiko NH35

Power Reserve

72h

Jewels

Pricing

1 specs

MSRP

—

$1,100

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Seiko Prospex SeavsWilliam Wood Valiant No-Date

At a glance

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