Side by side

Fortis Marinemaster M-40vsSeiko Prospex LX line

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
Prospex LX line
SeikoProspex LX line
MSRP $6,500

At a glance

13 of 29 specs differ
Diameter
Marinemaster M-4040mm
Prospex LX line44.8mm
Power Reserve
Marinemaster M-4038h
Prospex LX line72h
Water Resistance
Marinemaster M-40300m
Prospex LX line300m
MSRP
Marinemaster M-40$3,520
Prospex LX line$6,500

Full specifications

Case

5 specs
Diameter
40mm
44.8mm
Thickness
13mm
15.7mm
Lug-to-Lug
50.9mm
Lug Width
21mm
22mm
Material
Stainless Steel
Titanium

Crystal & Dial

3 specs
AR Coating
Inner
Anti-reflective coating on inner surface
Dial Color
Orange
Black
Lume
None
LumiBrite on hands and index(es)

Movement

4 specs
Caliber
Sellita SW220-1
5R65
Type
Automatic
Spring Drive
Power Reserve
38h
72h
Jewels
26
30

Pricing

1 specs
MSRP
$3,520
$6,500

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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 Prospex LX line

Owners widely report the Seiko Prospex LX line's finishing is a step up from other models, with a case that sits well on the wrist, and some praise the green sunburst dial with blue anti-reflective sapphire crystal as phenomenal. However, owners note the high MSRP limited sales, with some desiring smaller cases and a reduced price, and others experienced quality control issues such as detached second hands and peeling DLC coating, leading to concerns about fragility. On balance, owners feel the Seiko Prospex LX line was discontinued due to pricing that alienated its target market, despite its attractive dial.

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