Which is cheaper, the Seiko Prospex Sea or the William Wood International Association of Fire?

At MSRP the Seiko Prospex Sea is the cheaper of the two at $625, against $820 for the William Wood International Association of Fire — a $195 gap before any retailer discounting.

Which is bigger, the Seiko Prospex Sea or the William Wood International Association of Fire?

The Seiko Prospex Sea wears larger at 43.8mm versus 41mm for the William Wood International Association of Fire — a 2.8mm difference across the dial.

Which has better water resistance, the Seiko Prospex Sea or the William Wood International Association of Fire?

The Seiko Prospex Sea is rated to 200m versus 100m for the William Wood International Association of Fire.

Which has a longer power reserve, the Seiko Prospex Sea or the William Wood International Association of Fire?

The Seiko Prospex Sea carries a 41-hour power reserve against 40 hours on the William Wood International Association of Fire.

What movement does the Seiko Prospex Sea run compared to the William Wood International Association of Fire?

Both watches run automatic movements — the Seiko Prospex Sea uses the 4R35 and the William Wood International Association of Fire uses the Seiko NH35.

Side by side

Seiko Prospex SeavsWilliam Wood International Association of Fire

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

Seiko Prospex Sea

srpe37

MSRP $625

William Wood International Association of Fire

william-wood-iafc

MSRP $820

At a glance

14 of 29 specs differ

Diameter

Prospex Sea43.8mm

International Association of Fire41mm

Power Reserve

Prospex Sea41h

International Association of Fire40h

Water Resistance

Prospex Sea200m

International Association of Fire100m

MSRP

Prospex Sea$625

International Association of Fire$820

Full specifications

Case

6 specs

Diameter

43.8mm

41mm

Thickness

12.8mm

15mm

Lug-to-Lug

48.7mm

49mm

Lug Width

22mm

20mm

Material

Stainless Steel

316L Stainless Steel

Water Resistance

200m

100m

Crystal & Dial

4 specs

Crystal

Sapphire

Domed Sapphire

AR Coating

Anti-reflective coating on inner surface

Inner

Dial Color

Black

Standard

Lume

LumiBrite on hands, index(es) and bezel

None

Movement

3 specs

Caliber

4R35

Seiko NH35

Power Reserve

41h

40h

Jewels

Pricing

1 specs

MSRP

$625

$820

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