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

12 of 29 specs differ
Diameter
Marinemaster M-4040mm
Diamond Collection30mm
Power Reserve
Marinemaster M-4038h
Diamond Collection40h
Water Resistance
Marinemaster M-40300m
Diamond Collection50m
MSRP
Marinemaster M-40$3,520
Diamond Collection$525

Full specifications

Case

6 specs
Category
Diver
Dress
Diameter
40mm
30mm
Thickness
13mm
6.3mm
Lug-to-Lug
36.5mm
Lug Width
21mm
5mm
Water Resistance
300m
50m

Crystal & Dial

1 specs
Dial Color
Orange
Black

Movement

4 specs
Caliber
Sellita SW220-1
7N01
Type
Automatic
Quartz
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

The Seiko Diamond Collection is widely praised by owners for its stunning beauty, featuring 14 diamonds, a mother-of-pearl dial, and a two-tone color scheme. Reviewers note its dial is difficult to capture in photos and that its fit and finish suggest excellent value, especially when purchased on sale. One owner describes the gold plating on the bracelet showing some fading from desk work, and its gold tone may not suit all tastes. Overall, owners rate the Seiko Diamond Collection highly for its striking aesthetics and perceived value.

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