Side by side

Seiko Astron GPS Solar 2025 Limited EditionvsStudio Underd0g Mint Choc Chip (Gen3)

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
Mint Choc Chip (Gen3)
Studio Underd0gMint Choc Chip (Gen3)
MSRP $550

At a glance

14 of 29 specs differ
Diameter
Astron GPS Solar 2025 Limited Edition42mm
Mint Choc Chip (Gen3)38.5mm
Power Reserve
Astron GPS Solar 2025 Limited Edition40h
Mint Choc Chip (Gen3)40h
Water Resistance
Astron GPS Solar 2025 Limited Edition100m
Mint Choc Chip (Gen3)
MSRP
Astron GPS Solar 2025 Limited Edition$2,600
Mint Choc Chip (Gen3)$550

Full specifications

Case

7 specs
Category
GMT
Chronograph
Diameter
42mm
38.5mm
Thickness
12mm
Lug-to-Lug
47.9mm
Lug Width
14mm
Material
Titanium
Stainless Steel
Water Resistance
100m

Crystal & Dial

3 specs
AR Coating
Super-clear coating
Inner
Dial Color
Black
Standard
Lume
LumiBrite on hands and index(es)
None

Movement

3 specs
Caliber
3X62
Type
Quartz
Automatic
Jewels
10
25

Pricing

1 specs
MSRP
$2,600
$550

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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.

Studio Underd0g Mint Choc Chip (Gen3)

Owners and reviewers praise the Studio Underd0g Mint Choc Chip (Gen3) for its unique, visually striking design, featuring an asymmetrical dial, textured two-tone finish, orange chrono hand tips, and chocolate chip hour markers, all housed in a comfortable 38.5mm case with a hand-winding SeaGull ST-1901 movement and a goat-skin strap. Some owners, however, find the watch overpriced for its movement and dial quality, and a few feel it appears toy-like on larger wrists. Overall, owners and reviewers value the Studio Underd0g Mint Choc Chip (Gen3) for its distinctive aesthetic and comfortable wear, despite some reservations about price and perceived scale.

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