Side by side

Citizen Atomic Perpetual A-TvsLongines MASTER COLLECTION

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

MASTER COLLECTION
LonginesMASTER COLLECTION
MSRP $2,850

At a glance

22 of 29 specs differ
Diameter
Atomic Perpetual A-T41mm
MASTER COLLECTION40mm
Power Reserve
Atomic Perpetual A-T40h
MASTER COLLECTION72h
Water Resistance
Atomic Perpetual A-T200m
MASTER COLLECTION30m
MSRP
Atomic Perpetual A-T
MASTER COLLECTION$2,850

Full specifications

Case

8 specs
Category
Pilot
Diameter
41mm
40mm
Thickness
12mm
10.8mm
Lug-to-Lug
46mm
46.8mm
Lug Width
20mm
21mm
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
Dial Color
Blue
Silver
Indices
Applied
Painted Arabic numerals
Lume
None
Super-LumiNova

Movement

8 specs
Caliber
H800
L897.2
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, month and date by annual calendar

Pricing

1 specs
MSRP
$2,850

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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

Owners widely praise the Longines Master Collection for its excellent fit and finish, attractive dial aesthetics with engraved numerals and textures, and overall value, particularly for complications like chronographs and moonphases at its price point. Reviewers note the refined design and product quality, with some finding the case appears less thick than its stated height. Owners report a buttery winding feel and appreciate the 72-hour power reserve. However, some owners find the case finishing homogenous and the traditional styling overshadowed by modern trends. Specific models draw criticism for subdial placement cutting off numerals, a lack of bracelet micro-adjustments, uninspiring crown and pushers, and 30m water resistance being on the light side. One owner reported a broken moon phase setting mechanism, while another felt the dial and chapter ring looked cheap.

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