Side by side

Fortis Marinemaster M-40vsSeiko 5 Sports Field series

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
5 Sports Field series
Seiko5 Sports Field series
MSRP $315

At a glance

14 of 29 specs differ
Diameter
Marinemaster M-4040mm
5 Sports Field series39.4mm
Power Reserve
Marinemaster M-4038h
5 Sports Field series41h
Water Resistance
Marinemaster M-40300m
5 Sports Field series100m
MSRP
Marinemaster M-40$3,520
5 Sports Field series$315

Full specifications

Case

6 specs
Category
Diver
Sport
Diameter
40mm
39.4mm
Thickness
13mm
13.2mm
Lug-to-Lug
48.1mm
Lug Width
21mm
20mm
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
$315

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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 Field series

The Seiko 5 Sports Field series is praised for its value, offering an accessible explorer-style watch with a GMT complication and excellent legibility thanks to LumiBrite on the dial and bezel. The watches feature a 41mm stainless steel case, 100m water resistance, and are powered by either the 4R36 or 4R34 movement, both with a 41-hour power reserve. One reviewer notes the inclusion of a compass bezel with a lumed pearl and fully lumed Arabic numerals on the dial for the non-GMT models. Overall, reviewers consider the Seiko 5 Sports Field GMT models good value under 500 euros.

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