Side by side

Fortis Marinemaster M-40vsSternglas Naos Solar

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
Naos Solar
SternglasNaos Solar
MSRP $323

At a glance

13 of 29 specs differ
Diameter
Marinemaster M-4040mm
Naos Solar38mm
Power Reserve
Marinemaster M-4038h
Naos Solar
Water Resistance
Marinemaster M-40300m
Naos Solar50m
MSRP
Marinemaster M-40$3,520
Naos Solar$323

Full specifications

Case

6 specs
Category
Diver
Dress
Diameter
40mm
38mm
Thickness
13mm
10mm
Lug-to-Lug
42mm
Lug Width
21mm
20mm
Water Resistance
300m
50m

Crystal & Dial

2 specs
Dial Color
Orange
Lume
None
Luminova Punkten

Movement

4 specs
Caliber
Sellita SW220-1
Seiko VJ76
Type
Automatic
Solar
Power Reserve
38h
Jewels
26

Pricing

1 specs
MSRP
$3,520
$323

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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.

Sternglas Naos Solar

Owners widely praise the Sternglas Naos Solar for its elegant Bauhaus-inspired minimalist dial, slim profile, and value for money. The scratch-resistant curved sapphire crystal and functional date mechanism are noted as durable features, with one owner reporting good wear over a year. The solar power and accuracy are highlighted as practical advantages over automatic movements, which some find loud. However, opinions are split, with some owners finding the watch underwhelming and cheap-looking, like a toy, while others love its appearance in person and its clean, appealing design as a smartwatch alternative. The stock leather strap is described as decent but basic and potentially short for larger wrists, with one owner advising a third-party replacement for durability. One owner of a different variant noted the date font is too small to be useful.

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