Side by side

Seiko King Seiko KSKvsStudio Underd0g Full Moon

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

King Seiko KSK
SeikoKing Seiko KSK
MSRP $1,900
Full Moon
Studio Underd0gFull Moon
MSRP $800

At a glance

15 of 29 specs differ
Diameter
King Seiko KSK36.1mm
Full Moon39.5mm
Power Reserve
King Seiko KSK72h
Full Moon40h
Water Resistance
King Seiko KSK100m
Full Moon
MSRP
King Seiko KSK$1,900
Full Moon$800

Full specifications

Case

6 specs
Category
Dress
Casual
Diameter
36.1mm
39.5mm
Thickness
11.6mm
Lug-to-Lug
43mm
Lug Width
19mm
Water Resistance
100m

Crystal & Dial

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

Movement

4 specs
Caliber
6R51
Type
Automatic
Manual
Power Reserve
72h
40h
Jewels
24
25

Pricing

1 specs
MSRP
$1,900
$800

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What people say

Owners + reviewers, side by side

Synthesized for each watch independently from owner discussions, enthusiast forums, written reviews, and video reviewers.

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.

Studio Underd0g Full Moon

Owners widely praise the Studio Underd0g Full Moon's harmonious creamy dial and its 37mm case, which fits flawlessly. The innovative sapphire disc with numerals is a highlight, though two visible screws holding it are noted as a minor aesthetic drawback. Some owners find the watch overpriced, while others see value in the upgraded Sellita movement under $1k. Lume is surprisingly good, and the included NATO strap is preferred by some over the leather. Accuracy ranges from +1/+2 seconds per day to about -6 seconds per day. On balance, owners rate the Studio Underd0g Full Moon highly for its versatile dial and well-fitting case at the price point.

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