Side by side

Fortis Marinemaster M-40vsSeiko Coutura

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
Coutura
SeikoCoutura
MSRP $550

At a glance

13 of 29 specs differ
Diameter
Marinemaster M-4040mm
Coutura42mm
Power Reserve
Marinemaster M-4038h
Coutura40h
Water Resistance
Marinemaster M-40300m
Coutura100m
MSRP
Marinemaster M-40$3,520
Coutura$550

Full specifications

Case

6 specs
Category
Diver
Chronograph
Diameter
40mm
42mm
Thickness
13mm
11.8mm
Lug-to-Lug
50.2mm
Lug Width
21mm
20mm
Water Resistance
300m
100m

Crystal & Dial

2 specs
Dial Color
Orange
Black
Lume
None
LumiBrite on hands and index(es)

Movement

4 specs
Caliber
Sellita SW220-1
8T63
Type
Automatic
Quartz
Power Reserve
38h
40h
Jewels
26
25

Pricing

1 specs
MSRP
$3,520
$550

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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 Coutura

Owners widely praise the Seiko Coutura for its wear-resistant metal treatments, with one reporting minimal scratching after six years. The solar perpetual calendar and radio-controlled accuracy are noted as appealing features, alongside its attractive aesthetic and quality for the price. However, some find the design too busy, gaudy, or not suitable for daily wear, with mixed opinions on the proprietary bracelet. One owner flagged the solar power reserve as problematic, requiring constant light exposure. Overall, owners appreciate the Seiko Coutura for its functional solar and radio-controlled movement and durable build, despite some polarizing design elements.

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