Side by side

Hamilton Jazzmaster Performer AutovsSeiko 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 Performer Auto

Owners praise the Hamilton Jazzmaster Performer Auto for its stylish looks, clean case finishing, and 80-hour power reserve, making it a good option for a first Swiss watch. Some owners note the 34mm size might be small and suggest it is a bit pricey. One owner finds the flatter crystal reduces light reflection and perceived chunkiness, and it sits well on smaller wrists due to a reasonable lug-to-lug distance. Overall, owners rate the Hamilton Jazzmaster Performer Auto highly for its blend of brand reputation, aesthetics, and practical features at its price point.

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

12 of 29 specs differ
Diameter
Jazzmaster Performer Auto34mm
King Seiko KSK36.1mm
Power Reserve
Jazzmaster Performer Auto80h
King Seiko KSK72h
Water Resistance
Jazzmaster Performer Auto100m
King Seiko KSK100m
MSRP
Jazzmaster Performer Auto$1,245
King Seiko KSK$1,900

Full specifications

Case

4 specs
Diameter
34mm
36.1mm
Thickness
0mm
11.6mm
Lug-to-Lug
0mm
43mm
Lug Width
18mm
19mm

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

3 specs
Caliber
H-10
6R51
Power Reserve
80h
72h
Jewels
0
24

Pricing

1 specs
MSRP
$1,245
$1,900
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