Side by side

Fortis Marinemaster M-40vsMarathon JDD (Jumbo Day/Date) Anthracite Diver's Automatic

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
JDD (Jumbo Day/Date) Anthracite Diver's Automatic
MarathonJDD (Jumbo Day/Date) Anthracite Diver's Automatic
MSRP $3,250

At a glance

9 of 29 specs differ
Diameter
Marinemaster M-4040mm
JDD (Jumbo Day/Date) Anthracite Diver's Automatic46mm
Power Reserve
Marinemaster M-4038h
JDD (Jumbo Day/Date) Anthracite Diver's Automatic40h
Water Resistance
Marinemaster M-40300m
JDD (Jumbo Day/Date) Anthracite Diver's Automatic300m
MSRP
Marinemaster M-40$3,520
JDD (Jumbo Day/Date) Anthracite Diver's Automatic$3,250

Full specifications

Case

5 specs
Diameter
40mm
46mm
Thickness
13mm
18mm
Lug-to-Lug
55mm
Lug Width
21mm
22mm
Material
Stainless Steel
316L Stainless Steel (Anthracite IP)

Crystal & Dial

1 specs
Dial Color
Orange
Anthracite

Movement

2 specs
Power Reserve
38h
40h
Jewels
26
25

Pricing

1 specs
MSRP
$3,520
$3,250

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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.

Marathon JDD (Jumbo Day/Date) Anthracite Diver's Automatic

Owners widely praise the Marathon JDD (Jumbo Day/Date) Anthracite Diver's Automatic as a tough, underrated tool watch with lifestyle appeal, highlighting its robust build and tritium lume for excellent legibility. However, its 46mm size is a common criticism, with some finding it heavy and top-heavy, and the OEM rubber strap stiff. One owner noted the watch runs about 10 seconds fast after three days, and the ETA 2836-2 movement offers approximately two days of power reserve. On balance, owners and reviewers rate the Marathon JDD (Jumbo Day/Date) Anthracite Diver's Automatic highly for its robust tool-watch build and legibility, despite its substantial size.

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