Side by side

Hamilton Jazzmaster Thinline Small Second 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 Thinline Small Second Quartz

Owners widely praise the Hamilton Jazzmaster Thinline Small Second Quartz for its excellent value around $300, thin profile at 7mm to 8.4mm, and clean dial design with superb applied hour numerals and dauphine hands. One owner finds its champagne dial particularly upscale. However, the lume is considered terrible, barely lasting a few minutes, and the crown is noted as very small and difficult to manipulate. On balance, owners rate the Hamilton Jazzmaster Thinline Small Second Quartz highly for its thinness and clean dial design at the price.

Seiko King Seiko KSK

Owners and reviewers widely praise the King Seiko KSK for its exceptional dial and case finishing, often compared to higher-end brands, and its slim, retro design. The use of the Calibre 6L35 movement in some variants is seen as a significant upgrade, contributing to a refined feel, while others note the bracelet is unusually nice and the case offers a mix of brushed and polished finishes with sharp angles. However, some owners question the value proposition, citing misaligned screws and clasp components on their examples, and the standard 6R movement in some models is criticized as a disappointment for the price point. Accuracy figures range from +15/-10 seconds per day to +5 to +7 seconds per day, and water resistance is rated at 5 BAR or 50 meters. Overall, owners and reviewers find the King Seiko KSK to be a beautiful and classy watch with fantastic finishing, though some are divided on its value and movement choice at its price point.

At a glance

12 of 29 specs differ
Diameter
Jazzmaster Thinline Small Second Quartz40mm
King Seiko KSK38.6mm
Power Reserve
Jazzmaster Thinline Small Second Quartz
King Seiko KSK45h
Water Resistance
Jazzmaster Thinline Small Second Quartz50m
King Seiko KSK50m
MSRP
Jazzmaster Thinline Small Second Quartz$745
King Seiko KSK$3,300

Full specifications

Case

4 specs
Diameter
40mm
38.6mm
Thickness
7.35mm
10.7mm
Lug-to-Lug
0mm
45.8mm
Lug Width
20mm
19mm

Crystal & Dial

3 specs
Crystal Shape
Box
AR Coating
Anti-reflective coating on inner surface
Dial Color
Grey

Movement

4 specs
Caliber
980.163
6L35
Type
Quartz
Automatic
Power Reserve
0h
45h
Jewels
0
26

Pricing

1 specs
MSRP
$745
$3,300
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