Side by side

Fortis Marinemaster M-40vsSternglas Naos Pro GMT Automatik

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 Pro GMT Automatik
SternglasNaos Pro GMT Automatik
MSRP $863

At a glance

12 of 29 specs differ
Diameter
Marinemaster M-4040mm
Naos Pro GMT Automatik38mm
Power Reserve
Marinemaster M-4038h
Naos Pro GMT Automatik42h
Water Resistance
Marinemaster M-40300m
Naos Pro GMT Automatik50m
MSRP
Marinemaster M-40$3,520
Naos Pro GMT Automatik$863

Full specifications

Case

6 specs
Category
Diver
GMT
Diameter
40mm
38mm
Thickness
13mm
11mm
Lug-to-Lug
42mm
Lug Width
21mm
20mm
Water Resistance
300m
50m

Crystal & Dial

2 specs
Dial Color
Orange
Lume
None
Luminova Punkte

Movement

3 specs
Caliber
Sellita SW220-1
Miyota 9075
Power Reserve
38h
42h
Jewels
26

Pricing

1 specs
MSRP
$3,520
$863

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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 Pro GMT Automatik

Owners report the Sternglas Naos can feel underwhelming with a cheap feel and hands resembling office printer output, with some finding it wears smaller than expected and looks like a toy, though others appreciate its understated design. Reviewers highlight the Argo Automatic variant as a compelling sub-€400 mechanical watch with a colorful dial and practical date wheel, suitable for new collectors, featuring a 38mm case and a Miyota 8215 movement. On balance, the consensus is that the Sternglas Naos offers a mixed ownership experience, with its value proposition and entry-level appeal being its strongest points for some.

From video reviewers

The Sternglas Naos Pro GMT Automatik features a clean Bauhaus design that sets it apart from other GMT watches. A notable weakness is the watch's bezel action, which is not as smooth as some reviewers would have liked. Reviewers disagree on the watch's case size, with one reviewer stating it's slightly larger than the original Naos Automatic, while another reviewer doesn't mention this aspect at all.

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