Side by side

Fortis Marinemaster M-40vsNOMOS Glashütte Tetra 27 duo

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
Tetra 27 duo
NOMOS GlashütteTetra 27 duo
MSRP $2,090

At a glance

18 of 29 specs differ
Diameter
Marinemaster M-4040mm
Tetra 27 duo27.5mm
Power Reserve
Marinemaster M-4038h
Tetra 27 duo53 hoursh
Water Resistance
Marinemaster M-40300m
Tetra 27 duo50m
MSRP
Marinemaster M-40$3,520
Tetra 27 duo$2,090

Full specifications

Case

8 specs
Category
Diver
Dress
Diameter
40mm
27.5mm
Thickness
13mm
6.1mm
Lug-to-Lug
38.5mm
Lug Width
21mm
18mm
Finish
Brushed and polished
Water Resistance
300m
50m
Caseback
Solid

Crystal & Dial

4 specs
Crystal Shape
Flat
AR Coating
Inner
Dial Color
Orange
White
Indices
Applied

Movement

5 specs
Caliber
Sellita SW220-1
DUW 4001
Type
Automatic
Manual
Beat Rate
28,800 vph
21,600 vph
Power Reserve
38h
53 hoursh
Jewels
26
17

Pricing

1 specs
MSRP
$3,520
$2,090

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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.

NOMOS Glashütte Tetra 27 duo

Owners widely praise the NOMOS Glashütte Tetra 27 duo for its ideal small and light wearing dimensions, beautiful dial that shifts with lighting, and gorgeous blued hands, with some finding its 27mm size perfect for vintage preferences. The watch is noted for its precise, Art Deco-inspired design and good finishing. However, some owners and reviewers consider the 27.5mm size too small, labeling it a women's watch, though others find it unisex and note its square shape can make it wear larger. One owner flags the buckle as disappointingly generic and the grey suede strap as prone to getting dirty. Overall, owners and reviewers highly regard the NOMOS Glashütte Tetra 27 duo for its elegant design and comfortable wearability at its price point.

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