Side by side

Citizen Atomic Perpetual A-TvsLongines FLAGSHIP HERITAGE MOONPHASE

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

FLAGSHIP HERITAGE MOONPHASE
LonginesFLAGSHIP HERITAGE MOONPHASE
MSRP $3,450

At a glance

22 of 29 specs differ
Diameter
Atomic Perpetual A-T41mm
FLAGSHIP HERITAGE MOONPHASE38.5mm
Power Reserve
Atomic Perpetual A-T40h
FLAGSHIP HERITAGE MOONPHASE72h
Water Resistance
Atomic Perpetual A-T200m
FLAGSHIP HERITAGE MOONPHASE30m
MSRP
Atomic Perpetual A-T
FLAGSHIP HERITAGE MOONPHASE$3,450

Full specifications

Case

8 specs
Category
Pilot
Moonphase
Diameter
41mm
38.5mm
Thickness
12mm
12.4mm
Lug-to-Lug
46mm
46.3mm
Lug Width
20mm
19mm
Finish
Brushed and polished
Water Resistance
200m
30m
Caseback
Solid
Screw-down case back

Crystal & Dial

5 specs
Crystal Shape
Flat
AR Coating
Underside
Both sides
Dial Color
Blue
Ivory
Indices
Applied
Applied indexes
Lume
None
Super-LumiNova

Movement

8 specs
Caliber
H800
L899.5
Type
Solar
Automatic
Beat Rate
28,800 vph
25,200 vph
Power Reserve
40h
72h
Jewels
25
0
Hacking
Yes
No
Hand-winding
Yes
No
Complications
None
Hours, minutes, seconds, moon phase display and date indicated by small hand at

Pricing

1 specs
MSRP
$3,450

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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 HERITAGE MOONPHASE

The Longines Flagship Heritage Moonphase is widely praised for its elegant aesthetic, balanced midnight blue dial with dauphine hands and wedge indices, and the L899.5 movement's 72-hour power reserve. Owners appreciate its value, classy integrated moonphase complication with a night blue background and shiny silver stars, and comfortable 38.5mm case size with good finishing, fitting well on smaller wrists. However, reviewers and owners note its minimal 30-meter water resistance, a 3 o'clock crown that appears undersized, and a thickness of 12.4mm, which some find hinders its dress watch suitability and ability to slip under a cuff, though others find it wearable. Some also consider the design overly traditional and the rehaut depth excessive. On balance, owners and reviewers rate the Longines Flagship Heritage Moonphase highly for its elegant design and value proposition at its price point.

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