Side by side

Fortis Marinemaster M-40vsSeiko Diamond Collection

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

Marinemaster M-40
FortisMarinemaster M-40
MSRP $3,520
Diamond Collection
SeikoDiamond Collection
MSRP $525

At a glance

11 of 29 specs differ
Diameter
Marinemaster M-4040mm
Diamond Collection32mm
Power Reserve
Marinemaster M-4038h
Diamond Collection40h
Water Resistance
Marinemaster M-40300m
Diamond Collection100m
MSRP
Marinemaster M-40$3,520
Diamond Collection$525

Full specifications

Case

6 specs
Category
Diver
Dress
Diameter
40mm
32mm
Thickness
13mm
8.2mm
Lug-to-Lug
39mm
Lug Width
21mm
15mm
Water Resistance
300m
100m

Crystal & Dial

1 specs
Dial Color
Orange
Black

Movement

3 specs
Caliber
Sellita SW220-1
6N32
Power Reserve
38h
40h
Jewels
26
25

Pricing

1 specs
MSRP
$3,520
$525

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What people say

Owners + reviewers, side by side

Synthesized for each watch independently from owner discussions, enthusiast forums, written reviews, and video reviewers.

Fortis Marinemaster M-40

Owners praise the Fortis Amber Orange for its gorgeous appearance and strong wrist presence, noting its crazy lume and 70-hour power reserve. The Doxa SUB 300T, described as having a superb, eccentric design with a highly legible dial and functional no-decompression bezel, uses an ETA 2824-2 movement. However, the SUB 300T's 42.5mm case wears large and its 14mm thickness is not ideal for dress shirts, though it boasts 1,200m water resistance. On balance, owners appreciate the Fortis Amber Orange for its striking aesthetics and impressive lume.

Seiko Diamond Collection

Owners widely praise the Seiko Diamond Collection for its stunning beauty, particularly highlighting the 14 diamonds and the captivating mother-of-pearl dial. Its 33.2mm case size, 100m water resistance, sapphire crystal, and lightweight build are appreciated features contributing to comfortable wear. Some owners find the dial detail is best appreciated in direct sunlight. The gold plating on some models may show fading from desk work over time. Overall, owners rate the Seiko Diamond Collection highly for its dazzling aesthetics and comfortable, well-finished design at its price point.

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