Side by side

Seiko Astron GPS Solar 2025 Limited EditionvsVario 1918 SG60 Merlion Trench

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
1918 SG60 Merlion Trench
Vario1918 SG60 Merlion Trench
MSRP $428

At a glance

13 of 29 specs differ
Diameter
Astron GPS Solar 2025 Limited Edition42mm
1918 SG60 Merlion Trench37mm
Power Reserve
Astron GPS Solar 2025 Limited Edition40h
1918 SG60 Merlion Trench40h
Water Resistance
Astron GPS Solar 2025 Limited Edition100m
1918 SG60 Merlion Trench100m
MSRP
Astron GPS Solar 2025 Limited Edition$2,600
1918 SG60 Merlion Trench$428

Full specifications

Case

6 specs
Category
GMT
Field
Diameter
42mm
37mm
Thickness
12mm
10mm
Lug-to-Lug
47.9mm
45mm
Lug Width
14mm
18mm
Material
Titanium
Stainless Steel

Crystal & Dial

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

Movement

3 specs
Caliber
3X62
Miyota 82s5
Type
Quartz
Automatic
Jewels
10
25

Pricing

1 specs
MSRP
$2,600
$428

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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.

Vario 1918 SG60 Merlion Trench

The Vario 1918 SG60 Merlion Trench is widely seen as a commemorative keepsake, particularly for those celebrating Singapore's 60th anniversary or born in 1965. Reviewers note its vibrant red enamel dial and 37mm steel case with fixed wire lugs, along with 100m water resistance. One owner reported the watch is "patina-ing well" after three years, and the Miyota 82S5 movement is considered a reliable, cost-effective base. Overall, owners and reviewers appreciate the Vario 1918 SG60 Merlion Trench as a unique souvenir and tribute piece, with its distinctive enamel dial being a key draw.

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