Side by side

Fortis Marinemaster M-40vsSeiko Prospex Sea PADI Special Edition

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 Sea PADI Special Edition
SeikoProspex Sea PADI Special Edition
MSRP $650

At a glance

12 of 29 specs differ
Diameter
Marinemaster M-4040mm
Prospex Sea PADI Special Edition41.7mm
Power Reserve
Marinemaster M-4038h
Prospex Sea PADI Special Edition41h
Water Resistance
Marinemaster M-40300m
Prospex Sea PADI Special Edition200m
MSRP
Marinemaster M-40$3,520
Prospex Sea PADI Special Edition$650

Full specifications

Case

5 specs
Diameter
40mm
41.7mm
Thickness
13mm
12.3mm
Lug-to-Lug
49.5mm
Lug Width
21mm
20mm
Water Resistance
300m
200m

Crystal & Dial

3 specs
Crystal
Sapphire
Hardlex
Dial Color
Orange
Black
Lume
None
LumiBrite on hands, index(es) and bezel

Movement

3 specs
Caliber
Sellita SW220-1
4R35
Power Reserve
38h
41h
Jewels
26
23

Pricing

1 specs
MSRP
$3,520
$650

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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 Sea PADI Special Edition

The Seiko Prospex Sea PADI Special Edition is widely praised for its attractive blue and red PADI colors, rich dial aesthetic, and excellent lume that stands out even in dim environments. Owners highlight its robust build quality and excellent bezel action, noting the wave dial is a favorite. However, the Hardlex crystal and the 4R36 movement's accuracy range of +45 to -35 seconds per day are identified as compromises for the price. Some owners find the diver's extension difficult to open and the bracelet adjustment challenging, though manageable. On balance, owners and reviewers rate the Seiko Prospex Sea PADI Special Edition highly for its build quality and striking dial design at its price point.

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