Side by side

Citizen Atomic Perpetual A-TvsLongines FLAGSHIP CLASSIC

The numbers, the dial colors, the calibers — laid out so you can stop flipping between tabs.

FLAGSHIP CLASSIC
LonginesFLAGSHIP CLASSIC
MSRP $2,450

At a glance

20 of 29 specs differ
Diameter
Atomic Perpetual A-T41mm
FLAGSHIP CLASSIC30mm
Power Reserve
Atomic Perpetual A-T40h
FLAGSHIP CLASSIC45h
Water Resistance
Atomic Perpetual A-T200m
FLAGSHIP CLASSIC30m
MSRP
Atomic Perpetual A-T
FLAGSHIP CLASSIC$2,450

Full specifications

Case

8 specs
Category
Pilot
Dress
Diameter
41mm
30mm
Thickness
12mm
8.1mm
Lug-to-Lug
46mm
36.4mm
Lug Width
20mm
15mm
Finish
Brushed and polished
Water Resistance
200m
30m
Caseback
Solid
Transparent case back with sapphire crystal

Crystal & Dial

4 specs
Crystal Shape
Flat
Dial Color
Blue
Brown
Indices
Applied
Diamond indexes
Lume
None
Super-LumiNova

Movement

7 specs
Caliber
H800
L592.5
Type
Solar
Automatic
Power Reserve
40h
45h
Jewels
25
0
Hacking
Yes
No
Hand-winding
Yes
No
Complications
None
Hours, minutes, seconds and date

Pricing

1 specs
MSRP
$2,450

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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.

Longines FLAGSHIP CLASSIC

Owners widely praise the Longines FLAGSHIP CLASSIC for its vintage-inspired design, impressive finishing, and value, with many appreciating its classic aesthetic and sharp rendition of a traditional look. The 38.5mm size is frequently cited as a positive for those seeking a more traditional fit, and the "rice grain" bracelet and color are noted as versatile. Some owners find the watch lacks personality compared to other options, and one reviewer points out its 12.4mm thickness can prevent it from easily slipping under a cuff. On balance, owners and reviewers rate the Longines FLAGSHIP CLASSIC highly for its well-executed classic design and strong value proposition.

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