Side by side

Citizen Atomic Perpetual A-TvsFortis Marinemaster M-40

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

At a glance

13 of 29 specs differ
Diameter
Atomic Perpetual A-T41mm
Marinemaster M-4040mm
Power Reserve
Atomic Perpetual A-T40h
Marinemaster M-4038h
Water Resistance
Atomic Perpetual A-T200m
Marinemaster M-40300m
MSRP
Atomic Perpetual A-T
Marinemaster M-40$3,520

Full specifications

Case

6 specs
Category
Pilot
Diver
Diameter
41mm
40mm
Thickness
12mm
13mm
Lug-to-Lug
46mm
Lug Width
20mm
21mm
Water Resistance
200m
300m

Crystal & Dial

2 specs
AR Coating
Underside
Inner
Dial Color
Blue
Orange

Movement

4 specs
Caliber
H800
Sellita SW220-1
Type
Solar
Automatic
Power Reserve
40h
38h
Jewels
25
26

Pricing

1 specs
MSRP
$3,520

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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.

Citizen Atomic Perpetual A-T

Owners widely praise the Citizen Atomic Perpetual A-T for its handsome appearance, solid fit and finish, comfortable bracelet, and intuitive world time function. Its perpetual calendar and atomic timekeeping are highlighted as major conveniences, maintaining accuracy within 0.5 seconds even without syncing, and owners appreciate its "set & forget" nature and solar charging. The watch features a modest, stylish blue dial with delicate design details and a clutter-free layout, along with high water resistance without a screw-down crown and light titanium construction. Some find the dial unnecessarily busy, and its time zone functionality is noted as less useful outside the US, with atomic sync being less compelling below the equator. Accuracy is reported as +/-15 seconds per month if not syncing, but +/-0 seconds if it syncs via radio signal. Some find the watch a bit on the large side.

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.

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