Side by side

Seiko King Seiko KSKvsSpinnaker Spence 300

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
Spence 300
SpinnakerSpence 300
MSRP $650

At a glance

15 of 29 specs differ
Diameter
King Seiko KSK36.1mm
Spence 30040mm
Power Reserve
King Seiko KSK72h
Spence 30040h
Water Resistance
King Seiko KSK100m
Spence 300300m
MSRP
King Seiko KSK$1,900
Spence 300$650

Full specifications

Case

7 specs
Category
Dress
Diver
Diameter
36.1mm
40mm
Thickness
11.6mm
11.5mm
Lug-to-Lug
43mm
48mm
Lug Width
19mm
20mm
Material
Stainless Steel
316L Stainless Steel
Water Resistance
100m
300m

Crystal & Dial

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

Movement

3 specs
Caliber
6R51
SII NH35A
Power Reserve
72h
40h
Jewels
24
25

Pricing

1 specs
MSRP
$1,900
$650

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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.

Spinnaker Spence 300

The Spinnaker Spence 300 is widely praised for its slim 10.9mm case and 40mm diameter, offering a comfortable and uncommon thin diver design at its price point. Reviewers and owners highlight its value, especially below $350, and its blend of retro design with modern specifications, including a 300m depth rating and a fully indexed bezel. Some owners, however, find the dial printing and bracelet finishing to be less refined, with one noting the bracelet's male end links as a drawback. The consensus is that the Spinnaker Spence 300 is highly regarded for its exceptional value and wearable dimensions, making it a strong contender for an everyday sports watch.

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