Side by side

Fortis Marinemaster M-40vsSeiko Essentials Tank (Ladies)

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
Essentials Tank (Ladies)
SeikoEssentials Tank (Ladies)
MSRP $365

At a glance

13 of 29 specs differ
Diameter
Marinemaster M-4040mm
Essentials Tank (Ladies)26mm
Power Reserve
Marinemaster M-4038h
Essentials Tank (Ladies)40h
Water Resistance
Marinemaster M-40300m
Essentials Tank (Ladies)50m
MSRP
Marinemaster M-40$3,520
Essentials Tank (Ladies)$365

Full specifications

Case

6 specs
Category
Diver
Dress
Diameter
40mm
26mm
Thickness
13mm
6.4mm
Lug-to-Lug
34.8mm
Lug Width
21mm
15mm
Water Resistance
300m
50m

Crystal & Dial

2 specs
Crystal
Sapphire
Hardlex
Dial Color
Orange
Black

Movement

4 specs
Caliber
Sellita SW220-1
4N30
Type
Automatic
Quartz
Power Reserve
38h
40h
Jewels
26
25

Pricing

1 specs
MSRP
$3,520
$365

Follow this matchup

Get a note when Fortis Marinemaster M-40 vs Seiko Essentials Tank (Ladies) gets more votes, a community discussion, or a price drop. No account needed.

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 Essentials Tank (Ladies)

The Seiko Essentials Tank (Ladies) is praised for its clean and simple design, with owners noting its versatile look that pairs well with casual outfits. Some owners recommend swapping the bracelet for leather straps to enhance the classic tank watch aesthetic. Overall, owners rate the Seiko Essentials Tank (Ladies) highly for its adaptable style and straightforward design.

Keep exploring

More watches worth a look

Matched to the watches above on size, movement, style and price — microbrands first. Open any one to dig in.

Adjacent matchups

People also compared

Comparisons nearby in the catalog — alternatives to the watches above paired against the matchup.