Side by side

Grand Seiko SBGX353vsSeiko 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.

Grand Seiko SBGX353

The Grand Seiko SBGX353 is widely praised for its mesmerizing "Skyflake" textured blue dial, considered by owners to be "perfect art." Reviewers and owners alike highlight the watch's elegant 34mm case size and the advanced 9F61 quartz movement, noting its exceptional ±10 seconds per year accuracy and precise second-hand alignment. Some owners find the dial's aesthetic appeal slightly diminished when worn compared to other options, and one owner replaced the quick-release buckle for a Hirsch clasp. Overall, owners rate the Grand Seiko SBGX353 highly for its exquisite dial finishing and the precision of its quartz movement 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

13 of 29 specs differ
Diameter
SBGX35334mm
King Seiko KSK36.1mm
Power Reserve
SBGX353
King Seiko KSK72h
Water Resistance
SBGX35330m
King Seiko KSK100m
MSRP
SBGX353$4,100
King Seiko KSK$1,900

Full specifications

Case

5 specs
Diameter
34mm
36.1mm
Thickness
10.7mm
11.6mm
Lug-to-Lug
41.5mm
43mm
Lug Width
18mm
19mm
Water Resistance
30m
100m

Crystal & Dial

3 specs
Crystal Shape
Box
AR Coating
Yes
Anti-reflective coating on inner surface
Lume
None
LumiBrite on hands and index(es)

Movement

4 specs
Caliber
9F61
6R51
Type
Quartz
Automatic
Power Reserve
0h
72h
Jewels
0
24

Pricing

1 specs
MSRP
$4,100
$1,900
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