Side by side

Seiko AstronvsTissot PRC 100 Solar

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

Astron
SeikoAstron
MSRP $2,500
PRC 100 Solar
TissotPRC 100 Solar
MSRP $575

At a glance

13 of 29 specs differ
Diameter
Astron42mm
PRC 100 Solar39mm
Power Reserve
Astron40h
PRC 100 Solar40h
Water Resistance
Astron100m
PRC 100 Solar100m
MSRP
Astron$2,500
PRC 100 Solar$575

Full specifications

Case

6 specs
Category
GMT
Sport
Diameter
42mm
39mm
Thickness
12.4mm
9.22mm
Lug-to-Lug
49.5mm
39mm
Lug Width
14mm
20mm
Material
Titanium
Stainless Steel

Crystal & Dial

4 specs
AR Coating
Super-clear coating
Inner
Dial Color
Black
Silver
Indices
Applied
Indexes
Lume
LumiBrite on hands and index(es)
Super-LumiNova ®

Movement

2 specs
Caliber
5X83
Jewels
14
25

Pricing

1 specs
MSRP
$2,500
$575

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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

Owners widely praise the Seiko Astron for its spectacular technology, solar-powered quartz movement, and GPS time synchronization, making it a convenient grab-and-go option. The watch is frequently noted for its comfortable and lightweight titanium build, with some models featuring well-finished cases and robust ceramic bezels. Reviewers and owners alike highlight the dial's dynamic and shiny appearance, with textured hour markers and high-contrast edges. Accuracy is generally considered good, with figures ranging from +/- 15 seconds per month to within 1/2 second per day, easily corrected by GPS signal. However, some owners note that DST requires manual adjustment and that automatic time syncing depends on proximity to radio wave towers. The price point is a concern for some, who feel it competes with luxury watches without the same aesthetic appeal. One owner pointed out minimal lume and a slight misalignment of the minute hand on their model.

Tissot PRC 100 Solar

Owners and reviewers highlight the Tissot PRC 100 Solar's value and modern, urban aesthetic, with its slim 9.2mm case and good finishing for the price. The solar movement is a key feature, offering a 14-month power reserve and rapid charging capabilities. Some owners find the dial colors a bit uninspired, and the date window placement is disliked, while the second hand's ticking is noted as a drawback compared to automatic movements. The watch's 39mm case is considered versatile, though some prefer a smaller 35-37mm size. Overall, owners and reviewers consider the Tissot PRC 100 Solar a versatile daily wear, particularly for its solar technology and Swiss-made appeal at its price point.

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