Side by side

Glycine Airman Worldtimer GMTvsSeiko Astron

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

What people say

Owners + reviewers, side by side

Synthesized for each watch independently from owner discussions, enthusiast forums, written reviews, and video reviewers.

Glycine Airman Worldtimer GMT

Owners widely appreciate the Glycine Airman Worldtimer GMT for its comfortable 40mm size, attractive aesthetics, and value, particularly when found under $300. Some owners find the dual 12-hour and 24-hour dial and bezel useful for tracking three time zones, while others prefer a simpler 24-hour dial. One owner noted the GMT hand can be mistaken for the minute hand and that the ETA movement can have a misaligned GMT hand. On balance, owners value the Glycine Airman Worldtimer GMT for its comfortable wearability and strong value proposition.

Seiko Astron

Owners widely praise the Seiko Astron for its spectacular technology, solar-powered quartz movement, and GPS time synchronization, making it a convenient grab-and-go option. The watch is frequently noted for its comfortable and lightweight titanium build, with some models featuring well-finished cases and robust ceramic bezels. Reviewers and owners alike highlight the dial's dynamic and shiny appearance, with textured hour markers and high-contrast edges. Accuracy is generally considered good, with figures ranging from +/- 15 seconds per month to within 1/2 second per day, easily corrected by GPS signal. However, some owners note that DST requires manual adjustment and that automatic time syncing depends on proximity to radio wave towers. The price point is a concern for some, who feel it competes with luxury watches without the same aesthetic appeal. One owner pointed out minimal lume and a slight misalignment of the minute hand on their model.

At a glance

17 of 29 specs differ
Diameter
Airman Worldtimer GMT42mm
Astron42mm
Power Reserve
Airman Worldtimer GMT
Astron
Water Resistance
Airman Worldtimer GMT100m
Astron100m
MSRP
Airman Worldtimer GMT$1,395
Astron$2,500

Full specifications

Case

6 specs
Thickness
14mm
12.4mm
Lug-to-Lug
49.5mm
Lug Width
22mm
14mm
Material
Stainless Steel
Titanium
Finish
Caseback

Crystal & Dial

5 specs
Crystal Shape
AR Coating
Super-clear coating
Dial Color
Black
Indices
Lume
None
LumiBrite on hands and index(es)

Movement

5 specs
Caliber
RONDA 515.24H
5X83
Beat Rate
0 vph
Power Reserve
0h
Jewels
1
14
Complications
Date, World Time
None

Pricing

1 specs
MSRP
$1,395
$2,500
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