Side by side

Glycine Airman WorldtimervsSeiko Astron GPS Solar 2025 Limited Edition

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

Airman Worldtimer
GlycineAirman Worldtimer
MSRP $1,395
Astron GPS Solar 2025 Limited Edition
SeikoAstron GPS Solar 2025 Limited Edition
MSRP $2,600

At a glance

16 of 29 specs differ
Diameter
Airman Worldtimer42mm
Astron GPS Solar 2025 Limited Edition42mm
Power Reserve
Airman Worldtimer
Astron GPS Solar 2025 Limited Edition40h
Water Resistance
Airman Worldtimer100m
Astron GPS Solar 2025 Limited Edition100m
MSRP
Airman Worldtimer$1,395
Astron GPS Solar 2025 Limited Edition$2,600

Full specifications

Case

6 specs
Thickness
14mm
12mm
Lug-to-Lug
47.9mm
Lug Width
22mm
14mm
Material
Stainless Steel
Titanium
Finish
Brushed and polished
Caseback
Solid

Crystal & Dial

4 specs
Crystal Shape
Flat
AR Coating
Super-clear coating
Indices
Applied
Lume
None
LumiBrite on hands and index(es)

Movement

5 specs
Caliber
RONDA 515
3X62
Beat Rate
28,800 vph
Power Reserve
40h
Jewels
1
10
Complications
Date, World Time
None

Pricing

1 specs
MSRP
$1,395
$2,600

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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.

Glycine Airman Worldtimer

The Glycine Airman Worldtimer is widely appreciated for its classic pilot watch design and comfortable wearability, with owners specifically praising the 40mm GL1048's size and the 39mm Airman 18's legibility and build quality. The Airman 18's dial lume pips are noted as weaker than its hands, and some owners find the GMT hand on certain models difficult to read due to its thinness and lack of lume. Accuracy is generally acceptable, with one owner reporting no flaws and another noting a Sellita-based movement kept acceptable time. On balance, owners and reviewers rate the Glycine Airman Worldtimer highly for its faithful reproduction of a classic design and excellent value.

Seiko Astron GPS Solar 2025 Limited Edition

The Seiko Astron GPS Solar 2025 Limited Edition is widely praised for its advanced GPS time and date adjustment capabilities, powered by light to eliminate battery changes. Owners and reviewers highlight its impressive accuracy and the convenience of automatic time zone updates, with some specifically commending the wearability of the 39mm size and its clean, simple design. However, reception of the GPS signal requires an unobstructed view of the sky, and manual time zone adjustments are necessary for Daylight Saving Time on some variants. One owner notes a slight imperfection in chapter ring alignment on the 39mm model. On balance, owners and reviewers rate the Seiko Astron GPS Solar 2025 Limited Edition highly for its satellite-powered timekeeping and improved wearability in the 39mm configuration.

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