Side by side

Fortis Marinemaster M-40vsRolex Sea-Dweller

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
Sea-Dweller
RolexSea-Dweller
MSRP $22,450
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.

From video reviewers

The watch's Swiss Made construction and robust design are consistently praised. Reviewers noted the bracelet as a potential point of contention.

Rolex Sea-Dweller

The Rolex Sea-Dweller is widely considered a masculine and substantial watch, with owners appreciating its clean look and red dial text. Some find its 43mm size and thickness make it feel like a "tank" and potentially cause arm fatigue, especially for those with smaller wrists or after weight loss, while others prefer its chunkiness and consider it more proportionally appropriate for larger wrists. The Rolex Sea-Dweller is seen by some as a niche product compared to the Submariner due to its size and heft. One owner considers the Sea-Dweller 43mm dial superior to other modern Rolexes, noting its matte-ish finish and red lettering. On balance, owners rate the Rolex Sea-Dweller highly for its distinctive aesthetic and substantial presence, though its size and weight are polarizing factors.

At a glance

16 of 29 specs differ
Diameter
Marinemaster M-4040mm
Sea-Dweller43mm
Power Reserve
Marinemaster M-4038h
Sea-Dweller70h
Water Resistance
Marinemaster M-40300m
Sea-Dweller1,220m
MSRP
Marinemaster M-40$3,520
Sea-Dweller$22,450

Full specifications

Case

7 specs
Diameter
40mm
43mm
Thickness
13mm
Lug Width
21mm
Material
Stainless Steel
Yellow Rolesor
Finish
Brushed and polished
Water Resistance
300m
1220m
Caseback
Solid
Monobloc middle case, screw-down case back and winding crown

Crystal & Dial

4 specs
AR Coating
Inner
Dial Color
Orange
Black
Indices
Applied
Index
Lume
None
Chromalight

Movement

4 specs
Caliber
Sellita SW220-1
3235
Power Reserve
38h
70h
Jewels
26
31
Complications
None
Date

Pricing

1 specs
MSRP
$3,520
$22,450
Keep exploring

More watches worth a look

Matched to the watches above on size, movement, style and price — microbrands first. Open any one to dig in.

Follow this matchup

Get a note when Fortis Marinemaster M-40 vs Rolex Sea-Dweller gets more votes, a community discussion, or a price drop. No account needed.

Adjacent matchups

People also compared

Comparisons nearby in the catalog — alternatives to the watches above paired against the matchup.