Which is cheaper, the Fortis Marinemaster M-40 or the William Wood International Association of Fire?

At MSRP the William Wood International Association of Fire is the cheaper of the two at $820, against $3,520 for the Fortis Marinemaster M-40 — a $2,700 gap before any retailer discounting.

Which is bigger, the Fortis Marinemaster M-40 or the William Wood International Association of Fire?

The William Wood International Association of Fire wears larger at 41mm versus 40mm for the Fortis Marinemaster M-40 — a 1mm difference across the dial.

Which has better water resistance, the Fortis Marinemaster M-40 or the William Wood International Association of Fire?

The Fortis Marinemaster M-40 is rated to 300m versus 100m for the William Wood International Association of Fire.

Which has a longer power reserve, the Fortis Marinemaster M-40 or the William Wood International Association of Fire?

The William Wood International Association of Fire carries a 40-hour power reserve against 38 hours on the Fortis Marinemaster M-40.

What movement does the Fortis Marinemaster M-40 run compared to the William Wood International Association of Fire?

Both watches run automatic movements — the Fortis Marinemaster M-40 uses the Sellita SW220-1 and the William Wood International Association of Fire uses the Seiko NH35.

Side by side

Fortis Marinemaster M-40vsWilliam Wood International Association of Fire

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

Fortis Marinemaster M-40

M-40

MSRP $3,520

William Wood International Association of Fire

william-wood-iafc

MSRP $820

At a glance

12 of 29 specs differ

Diameter

Marinemaster M-4040mm

International Association of Fire41mm

Power Reserve

Marinemaster M-4038h

International Association of Fire40h

Water Resistance

Marinemaster M-40300m

International Association of Fire100m

MSRP

Marinemaster M-40$3,520

International Association of Fire$820

Full specifications

Case

6 specs

Diameter

40mm

41mm

Thickness

13mm

15mm

Lug-to-Lug

—

49mm

Lug Width

21mm

20mm

Material

Stainless Steel

316L Stainless Steel

Water Resistance

300m

100m

Crystal & Dial

2 specs

Crystal

Sapphire

Domed Sapphire

Dial Color

Orange

Standard

Movement

3 specs

Caliber

Sellita SW220-1

Seiko NH35

Power Reserve

38h

40h

Jewels

Pricing

1 specs

MSRP

$3,520

$820

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