Side by side

Citizen Atomic Perpetual A-TvsLongines MASTER COLLECTION MOONPHASE

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

MASTER COLLECTION MOONPHASE
LonginesMASTER COLLECTION MOONPHASE
MSRP $3,000

At a glance

22 of 29 specs differ
Diameter
Atomic Perpetual A-T41mm
MASTER COLLECTION MOONPHASE34mm
Power Reserve
Atomic Perpetual A-T40h
MASTER COLLECTION MOONPHASE72h
Water Resistance
Atomic Perpetual A-T200m
MASTER COLLECTION MOONPHASE30m
MSRP
Atomic Perpetual A-T
MASTER COLLECTION MOONPHASE$3,000

Full specifications

Case

8 specs
Category
Pilot
Moonphase
Diameter
41mm
34mm
Thickness
12mm
11.1mm
Lug-to-Lug
46mm
41.7mm
Lug Width
20mm
18mm
Finish
Brushed and polished
Water Resistance
200m
30m
Caseback
Solid
Transparent case back with sapphire crystal

Crystal & Dial

5 specs
Crystal Shape
Flat
AR Coating
Underside
Both sides
Dial Color
Blue
Silver
Indices
Applied
Painted Arabic numerals
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
$3,000

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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 MASTER COLLECTION MOONPHASE

Owners widely praise the Longines MASTER COLLECTION MOONPHASE for its mesmerizing and legible dial, balancing classic and complex design elements, with many considering it a great value for its complications. Reviewers note the 40mm case feels well-balanced, and the Caliber L899 movement offers a 64-hour power reserve. Some owners suggest the price point may be high relative to alternatives, and the 3 bar water resistance means it is not suitable for swimming, while the complete calendar requires manual adjustment for shorter months. On balance, the consensus is that owners rate the Longines MASTER COLLECTION MOONPHASE highly for its attractive dial and complications at its price point.

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