Side by side

Hamilton Jazzmaster Gent QuartzvsSeiko King Seiko KSK

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 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.

From video reviewers

The sunburst blue dial and quartz movement accuracy are defining strengths of this watch. Both reviewers affirm the quality materials and modern styling, though specific performance comparisons or durability concerns were not detailed by either reviewer.

Seiko King Seiko KSK

The King Seiko KSK is widely praised for its refined finishing, with owners and reviewers noting its sharp case, faceted lugs, and well-executed dial indices, often comparing its polishing favorably to Grand Seiko. Enthusiasts appreciate its slim, retro design, with some stating it wears smaller than its official size due to the cushion case and close-to-the-wrist feel. The use of the slimline Calibre 6L35 movement is seen as an upgrade, maintaining the watch's slender profile, though some owners express concern over the price point and the perceived value of the movement. Accuracy figures vary, with one owner reporting +5 to +7 seconds per day, while another notes +15/-10 seconds per day. Some owners have noted minor quality control issues such as misaligned screws or a burr on a hand. On balance, owners and reviewers rate the King Seiko KSK highly for its exceptional case and dial finishing at its price point.

At a glance

14 of 29 specs differ
Diameter
Jazzmaster Gent Quartz40mm
King Seiko KSK36.1mm
Power Reserve
Jazzmaster Gent Quartz
King Seiko KSK72h
Water Resistance
Jazzmaster Gent Quartz50m
King Seiko KSK100m
MSRP
Jazzmaster Gent Quartz$745
King Seiko KSK$1,900

Full specifications

Case

5 specs
Diameter
40mm
36.1mm
Thickness
10.2mm
11.6mm
Lug-to-Lug
0mm
43mm
Lug Width
20mm
19mm
Water Resistance
50m
100m

Crystal & Dial

4 specs
Crystal Shape
Box
AR Coating
Anti-reflective coating on inner surface
Dial Color
Blue
Lume
None
LumiBrite on hands and index(es)

Movement

4 specs
Caliber
F06.111
6R51
Type
Quartz
Automatic
Power Reserve
0h
72h
Jewels
0
24

Pricing

1 specs
MSRP
$745
$1,900
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