Side by side

Fortis Marinemaster M-40vsSinn U50 HYDRO SDR with TEGIMENT option

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
U50 HYDRO SDR with TEGIMENT option
SinnU50 HYDRO SDR with TEGIMENT option
MSRP $3,110

At a glance

17 of 29 specs differ
Diameter
Marinemaster M-4040mm
U50 HYDRO SDR with TEGIMENT option41mm
Power Reserve
Marinemaster M-4038h
U50 HYDRO SDR with TEGIMENT option40h
Water Resistance
Marinemaster M-40300m
U50 HYDRO SDR with TEGIMENT option5,000m
MSRP
Marinemaster M-40$3,520
U50 HYDRO SDR with TEGIMENT option$3,110

Full specifications

Case

6 specs
Diameter
40mm
41mm
Thickness
13mm
11.8mm
Lug Width
21mm
20mm
Finish
Brushed and polished
bead-blasted
Water Resistance
300m
5000m
Caseback
Solid

Crystal & Dial

5 specs
Crystal Shape
Flat
AR Coating
Inner
Underside
Dial Color
Orange
Black
Indices
Applied
Lume
None
Luminescent

Movement

5 specs
Caliber
Sellita SW220-1
Ronda 715 Li - SWISS MADE
Type
Automatic
Quartz
Power Reserve
38h
40h
Jewels
26
5
Complications
None
Date

Pricing

1 specs
MSRP
$3,520
$3,110

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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.

Sinn U50 HYDRO SDR with TEGIMENT option

The Sinn U50 HYDRO SDR with TEGIMENT option is widely praised for its exceptional scratch resistance and legibility, with owners reporting no signs of wear after extended use. The oil-filled case contributes to extreme water resistance and a clear dial, while the fully tegimented construction offers a soft feel on the wrist. Reviewers note the compact 41mm size, though one owner found it did not wear as thin as expected due to its thickness. The lume is considered underwhelming by some, and the diving extension on the clasp can release too easily. It utilizes a quartz movement, which is noted as less accurate than previous thermo-compensated options. Overall, owners and reviewers rate the Sinn U50 HYDRO SDR with TEGIMENT option highly for its robust, legible, and virtually indestructible build at its price point.

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