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 $3,450

At a glance

21 of 29 specs differ
Diameter
Atomic Perpetual A-T41mm
MASTER COLLECTION MOONPHASE40mm
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$3,450

Full specifications

Case

8 specs
Category
Pilot
Moonphase
Diameter
41mm
40mm
Thickness
12mm
11.1mm
Lug-to-Lug
46mm
47mm
Lug Width
20mm
21mm
Finish
Brushed and polished
Water Resistance
200m
30m
Caseback
Solid
Transparent case back with sapphire crystal

Crystal & Dial

4 specs
Crystal Shape
Flat
AR Coating
Underside
Indices
Applied
Diamond 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 MASTER COLLECTION MOONPHASE

Owners widely praise the Longines MASTER COLLECTION MOONPHASE for its legible dial, romantic moonphase complication, and overall value for money. Reviewers note its classic design, barleycorn guilloché dial, and Roman numerals. Some owners find the strap superb, while others mention the cut-off Roman numeral six as a potential drawback. The watch has a 3 bar water resistance, limiting its use to drier environments, and the complete calendar requires manual adjustment for shorter months. On balance, the consensus is that the Longines MASTER COLLECTION MOONPHASE is highly regarded for its attractive dial and complication at its price point.

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