Side by side

Hamilton Jazzmaster Chrono QuartzvsSeiko 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.

Hamilton Jazzmaster Chrono Quartz

Owners widely praise the Hamilton Jazzmaster Chrono Quartz for its excellent value, with some enthusiasts appreciating its unique styling. However, the open-heart design is a point of contention; some find it cluttered and prone to collecting dirt, while others report difficulty reading the time with it, particularly as eyesight declines. One owner notes the movement is not exceptional. On balance, owners consider the Hamilton Jazzmaster Chrono Quartz a superb deal, with its value being the primary draw.

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

12 of 29 specs differ
Diameter
Jazzmaster Chrono Quartz42mm
Astron GPS Solar 2025 Limited Edition43.4mm
Power Reserve
Jazzmaster Chrono Quartz
Astron GPS Solar 2025 Limited Edition
Water Resistance
Jazzmaster Chrono Quartz100m
Astron GPS Solar 2025 Limited Edition100m
MSRP
Jazzmaster Chrono Quartz$1,075
Astron GPS Solar 2025 Limited Edition$2,900

Full specifications

Case

5 specs
Diameter
42mm
43.4mm
Thickness
12.13mm
13.4mm
Lug-to-Lug
0mm
49.5mm
Lug Width
22mm
14mm
Material
Stainless Steel
Titanium

Crystal & Dial

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

Movement

2 specs
Caliber
251.274
5X83
Jewels
0
14

Pricing

1 specs
MSRP
$1,075
$2,900
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