Side by side

Seiko Astron GPS Solar 2025 Limited EditionvsHorage Supersede GMT

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

Astron GPS Solar 2025 Limited Edition
SeikoAstron GPS Solar 2025 Limited Edition
MSRP $2,600
Supersede GMT
HorageSupersede GMT
MSRP $7,270

At a glance

14 of 29 specs differ
Diameter
Astron GPS Solar 2025 Limited Edition42mm
Supersede GMT39.5mm
Power Reserve
Astron GPS Solar 2025 Limited Edition40h
Supersede GMT72h
Water Resistance
Astron GPS Solar 2025 Limited Edition100m
Supersede GMT200m
MSRP
Astron GPS Solar 2025 Limited Edition$2,600
Supersede GMT$7,270

Full specifications

Case

6 specs
Diameter
42mm
39.5mm
Thickness
12mm
9.85mm
Lug-to-Lug
47.9mm
46.29mm
Lug Width
14mm
22mm
Material
Titanium
Stainless Steel
Water Resistance
100m
200m

Crystal & Dial

2 specs
AR Coating
Super-clear coating
No
Lume
LumiBrite on hands and index(es)
Super-LumiNova

Movement

5 specs
Caliber
3X62
Horage K2
Type
Quartz
Automatic
Power Reserve
40h
72h
Jewels
10
25
Complications
None
GMT

Pricing

1 specs
MSRP
$2,600
$7,270

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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.

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.

Horage Supersede GMT

The Horage Supersede GMT is widely praised for its innovative micro-rotor movement and impressive finishing. Owners and reviewers highlight its value as a true GMT sports watch, noting the compact 39.5mm case and 200m water resistance. The K2 movement offers a 72-hour power reserve, and updates include an optional platinum rotor, a luminous seconds hand tip, and a new micro-adjustable clasp. One potential hesitation for buyers is the inability to see the watch in person. Overall, owners and reviewers rate the Horage Supersede GMT highly for its innovative micro-rotor movement and excellent value.

From video reviewers

The Horage Supersede GMT features a unique case design that blends different styles. A notable strength is its in-house K2 micro-rotor movement. One weakness is the relatively average lume brightness.

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