Side by side

Hamilton Jazzmaster Gent QuartzvsSeiko Astron

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

Jazzmaster Gent Quartz
HamiltonJazzmaster Gent Quartz
MSRP $745
Astron
SeikoAstron
MSRP $2,500

At a glance

13 of 29 specs differ
Diameter
Jazzmaster Gent Quartz40mm
Astron42mm
Power Reserve
Jazzmaster Gent Quartz40h
Astron40h
Water Resistance
Jazzmaster Gent Quartz50m
Astron100m
MSRP
Jazzmaster Gent Quartz$745
Astron$2,500

Full specifications

Case

7 specs
Category
Dress
GMT
Diameter
40mm
42mm
Thickness
10.2mm
12.4mm
Lug-to-Lug
46mm
49.5mm
Lug Width
20mm
14mm
Material
Stainless Steel
Titanium
Water Resistance
50m
100m

Crystal & Dial

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

Movement

2 specs
Caliber
F06.111
5X83
Jewels
25
14

Pricing

1 specs
MSRP
$745
$2,500

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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.

Hamilton Jazzmaster Gent Quartz

Owners widely praise the Hamilton Jazzmaster Gent Quartz for its dressier, unique aesthetic, with specific admiration for the dark, iridescent dial and the machine-work on the minute markers. The 40mm size is considered suitable for smaller wrists, though lug-to-lug measurements are debated. Some owners find the open-heart dial busy and difficult to read due to silver lines resembling hands, and the skeleton version is also noted for excessive branding. The H-20-S movement in the skeleton model is thought to have a 42-hour power reserve. Overall, owners appreciate the Hamilton Jazzmaster Gent Quartz for its distinctive mid-century modern design and detailed finishing.

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.

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