Side by side

Citizen Zenshin SenkeivsSeiko Astron GPS Solar 2025 Limited Edition

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.

Citizen Zenshin Senkei

The Citizen Zenshin Senkei is praised for its appealing color options and accessible price point, featuring a titanium case and a grid-patterned dial. Its Eco-Drive B620 movement provides accuracy of ±15 seconds per month. On balance, owners and reviewers highlight the Citizen Zenshin Senkei's value proposition and distinctive design elements.

Seiko Astron GPS Solar 2025 Limited Edition

The Seiko Astron GPS Solar 2025 Limited Edition is lauded for its advanced satellite timekeeping and perpetual calendar functionality, offering global time and location updates via GPS signals. Owners appreciate its well-built titanium or steel case, often featuring a ceramic bezel, and the unique asymmetrical design inspired by the 1983 Seiko 7A28 6000. However, its substantial 47mm size and 16.5mm thickness are frequently noted as drawbacks, with some finding it wears large and is difficult to fit under shirt sleeves. The perpetual calendar is limited to displaying only the date, and GPS signal reception requires a clear view of the sky, posing challenges indoors. The watch is priced around $2,900 and is limited to 3,000 pieces. Overall, owners and reviewers value the Seiko Astron GPS Solar 2025 Limited Edition for its cutting-edge technology and distinctive design, despite its considerable dimensions.

At a glance

13 of 29 specs differ
Diameter
Zenshin Senkei41mm
Astron GPS Solar 2025 Limited Edition43.4mm
Power Reserve
Zenshin Senkei
Astron GPS Solar 2025 Limited Edition
Water Resistance
Zenshin Senkei100m
Astron GPS Solar 2025 Limited Edition100m
MSRP
Zenshin Senkei$506
Astron GPS Solar 2025 Limited Edition$2,900

Full specifications

Case

5 specs
Diameter
41mm
43.4mm
Thickness
0mm
13.4mm
Lug-to-Lug
0mm
49.5mm
Lug Width
0mm
14mm
Material
Super Titanium
Titanium

Crystal & Dial

4 specs
Crystal Shape
Curved
AR Coating
Super-clear coating
Dial Color
White
Lume
None
LumiBrite on hands and index(es)

Movement

3 specs
Caliber
B620
5X83
Type
Solar
Quartz
Jewels
0
14

Pricing

1 specs
MSRP
$506
$2,900
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