Side by side

Fortis Marinemaster M-40vsSeiko 5 Sports SKX series DENHAM Limited Edition, Seiko Boutique exclusive model

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

At a glance

13 of 29 specs differ
Diameter
Marinemaster M-4040mm
5 Sports SKX series DENHAM Limited Edition, Seiko Boutique exclusive model42.5mm
Power Reserve
Marinemaster M-4038h
5 Sports SKX series DENHAM Limited Edition, Seiko Boutique exclusive model41h
Water Resistance
Marinemaster M-40300m
5 Sports SKX series DENHAM Limited Edition, Seiko Boutique exclusive model100m
MSRP
Marinemaster M-40$3,520
5 Sports SKX series DENHAM Limited Edition, Seiko Boutique exclusive model$430

Full specifications

Case

5 specs
Diameter
40mm
42.5mm
Thickness
13mm
13.4mm
Lug-to-Lug
46mm
Lug Width
21mm
22mm
Water Resistance
300m
100m

Crystal & Dial

4 specs
Crystal
Sapphire
Hardlex
Crystal Shape
Flat
Curved
Dial Color
Orange
Black
Lume
None
LumiBrite on hands and index(es)

Movement

3 specs
Caliber
Sellita SW220-1
4R36
Power Reserve
38h
41h
Jewels
26
24

Pricing

1 specs
MSRP
$3,520
$430

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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 5 Sports SKX series DENHAM Limited Edition, Seiko Boutique exclusive model

Owners widely praise the 5 Sports SKX series DENHAM Limited Edition for its translucent indigo dial, spinning day/date wheels, Kanji day display, and exceptionally smooth bezel action, finding it unique without being gaudy. One owner highlights the premium NATO strap and denim-inspired design, while others note its appeal with blue jeans and a resemblance to other denim-themed watches. The 4R36 movement powers the watch, offering a 41-hour power reserve. However, one reviewer found the overall execution crude and the nylon strap a dissonant element, suggesting a different platform would have been more suitable. Some owners also note the watch is a bit large. On balance, owners and reviewers appreciate the 5 Sports SKX series DENHAM Limited Edition for its distinctive denim-inspired aesthetic and unique dial features.

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