Side by side

Seiko King Seiko KSKvsSpinnaker Bradner GMT

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
Bradner GMT
SpinnakerBradner GMT
MSRP $299

At a glance

15 of 29 specs differ
Diameter
King Seiko KSK36.1mm
Bradner GMT42mm
Power Reserve
King Seiko KSK72h
Bradner GMT40h
Water Resistance
King Seiko KSK100m
Bradner GMT180m
MSRP
King Seiko KSK$1,900
Bradner GMT$299

Full specifications

Case

7 specs
Category
Dress
GMT
Diameter
36.1mm
42mm
Thickness
11.6mm
15mm
Lug-to-Lug
43mm
50mm
Lug Width
19mm
22mm
Material
Stainless Steel
316L Stainless Steel
Water Resistance
100m
180m

Crystal & Dial

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

Movement

3 specs
Caliber
6R51
Seiko NH34A
Power Reserve
72h
40h
Jewels
24
25

Pricing

1 specs
MSRP
$1,900
$299

Follow this matchup

Get a note when Seiko King Seiko KSK vs Spinnaker Bradner GMT 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.

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 Bradner GMT

The Spinnaker Bradner GMT is praised for its awesome lume and comfortable wearability, with one owner noting the rubber strap is very comfortable and the beads of rice bracelet fits well on smaller wrists. Some find its 15mm thickness and bold colorway may not appeal to everyone, and one owner views it as more of a casual GMT with tool-watch styling than a diver. Overall, owners rate the Spinnaker Bradner GMT highly for its value and comfortable wearability.

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.