Side by side

Zelos Nasa Edition (sellita)vsFortis Marinemaster M-40

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

Nasa Edition (sellita)
ZelosNasa Edition (sellita)
MSRP $629
Marinemaster M-40
FortisMarinemaster M-40
MSRP $3,520

At a glance

14 of 29 specs differ
Diameter
Nasa Edition (sellita)39mm
Marinemaster M-4040mm
Power Reserve
Nasa Edition (sellita)40h
Marinemaster M-4038h
Water Resistance
Nasa Edition (sellita)50m
Marinemaster M-40300m
MSRP
Nasa Edition (sellita)$629
Marinemaster M-40$3,520

Full specifications

Case

7 specs
Category
Dress
Diver
Diameter
39mm
40mm
Thickness
7.6mm
13mm
Lug-to-Lug
39mm
Lug Width
20mm
21mm
Material
316L Stainless Steel
Stainless Steel
Water Resistance
50m
300m

Crystal & Dial

2 specs
Crystal
Domed Sapphire
Sapphire
Dial Color
NASA Edition (Sellita)
Orange

Movement

4 specs
Caliber
ETA/Peseux 7001
Sellita SW220-1
Type
Manual
Automatic
Power Reserve
40h
38h
Jewels
25
26

Pricing

1 specs
MSRP
$629
$3,520

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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.

Zelos Nasa Edition (sellita)

The Zelos Nasa Edition (sellita) is praised for its thinness, stemming from its hand-wound Sellita SW215 movement, and is noted for its good size and wearability. The watch features a 39mm case, a 45mm lug to lug, and a 20mm lug width. On balance, owners rate the Zelos Nasa Edition (sellita) highly for its comfortable dimensions and thin profile.

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.

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