Side by side

Grand Seiko SBGR321vsSeiko King Seiko KSK

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

SBGR321
Grand SeikoSBGR321
MSRP $5,200
King Seiko KSK
SeikoKing Seiko KSK
MSRP $3,300

At a glance

11 of 29 specs differ
Diameter
SBGR32140mm
King Seiko KSK38.6mm
Power Reserve
SBGR32172h
King Seiko KSK45h
Water Resistance
SBGR321100m
King Seiko KSK50m
MSRP
SBGR321$5,200
King Seiko KSK$3,300

Full specifications

Case

5 specs
Diameter
40mm
38.6mm
Thickness
13mm
10.7mm
Lug-to-Lug
46.6mm
45.8mm
Lug Width
20mm
19mm
Water Resistance
100m
50m

Crystal & Dial

2 specs
Crystal Shape
Flat
Box
AR Coating
Yes
Anti-reflective coating on inner surface

Movement

3 specs
Caliber
9S65
6L35
Power Reserve
72h
45h
Jewels
25
26

Pricing

1 specs
MSRP
$5,200
$3,300

Follow this matchup

Get a note when Grand Seiko SBGR321 vs Seiko King Seiko KSK gets more votes, a community discussion, or a price drop. No account needed.

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 SBGR321

Grand Seiko SBGR321 owners and reviewers widely praise its attractive design, compelling dimensions, and robust movement. The watch features sharp case lines with contrasting brushing and polishing, a 40mm steel case that provides presence without bulk, and 100m water resistance. Its sunburst blue dial, inspired by the dawn sky over Mount Iwate, showcases Grand Seiko's signature finishing on applied markers and hands, with a red-tipped seconds hand. The 9S65 automatic movement is noted for its precision, running within specifications, with one source reporting a +5 to -3 seconds a day rate and a 3-day power reserve. A blue rotor with a crimson rim, also inspired by Mount Iwate, is visible through the display caseback. On balance, owners and reviewers rate the Grand Seiko SBGR321 highly for its exceptional finishing and compelling blue dial design at its price point.

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.

Keep exploring

More watches worth a look

Matched to the watches above on size, movement, style and price — microbrands first. Open any one to dig in.

Adjacent matchups

People also compared

Comparisons nearby in the catalog — alternatives to the watches above paired against the matchup.