Side by side

Fortis Marinemaster M-40vsTudor Black Bay GMT

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
Black Bay GMT
TudorBlack Bay GMT
MSRP $5,275

At a glance

20 of 29 specs differ
Diameter
Marinemaster M-4040mm
Black Bay GMT41mm
Power Reserve
Marinemaster M-4038h
Black Bay GMT70h
Water Resistance
Marinemaster M-40300m
Black Bay GMT200m
MSRP
Marinemaster M-40$3,520
Black Bay GMT$5,275

Full specifications

Case

8 specs
Category
Diver
GMT
Diameter
40mm
41mm
Thickness
13mm
14.6mm
Lug-to-Lug
46mm
Lug Width
21mm
22mm
Finish
Brushed and polished
Polished + Satin
Water Resistance
300m
200m
Caseback
Solid
Solid screw-down

Crystal & Dial

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

Movement

7 specs
Caliber
Sellita SW220-1
MT5652
Beat Rate
28,800 vph
0 vph
Power Reserve
38h
70h
Jewels
26
0
Hacking
Yes
No
Hand-winding
Yes
No
Complications
None
GMT

Pricing

1 specs
MSRP
$3,520
$5,275

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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.

Tudor Black Bay GMT

The Tudor Black Bay GMT is widely praised for its in-house movement offering local jumping GMT functionality, its impressive case finishing, and its vintage-inspired, drop-dead good looks. Reviewers highlight its strong value and consider it a quintessential sport watch for travelers. Some enthusiasts find its 15mm thickness divisive, though beveled edges visually reduce its perceived size. Overall, reviewers rate the Tudor Black Bay GMT highly for its excellent design and travel functionality at its price point.

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