Side by side

Boldr Expedition EnigmathvsSeiko King Seiko KSK

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

Expedition Enigmath
BoldrExpedition Enigmath
MSRP $599
King Seiko KSK
SeikoKing Seiko KSK
MSRP $2,000

At a glance

14 of 29 specs differ
Diameter
Expedition Enigmath41mm
King Seiko KSK38.3mm
Power Reserve
Expedition Enigmath42h
King Seiko KSK72h
Water Resistance
Expedition Enigmath200m
King Seiko KSK100m
MSRP
Expedition Enigmath$599
King Seiko KSK$2,000

Full specifications

Case

6 specs
Category
Tool
Dress
Diameter
41mm
38.3mm
Thickness
12.8mm
11.7mm
Lug-to-Lug
47.5mm
46mm
Lug Width
20mm
19mm
Water Resistance
200m
100m

Crystal & Dial

4 specs
Crystal Shape
Flat
Box
AR Coating
Yes
Anti-reflective coating on inner surface
Dial Color
Enigmath Coconino
Black
Lume
Super-LumiNova
LumiBrite on Hands

Movement

3 specs
Caliber
Miyota 9039,
6R55
Power Reserve
42h
72h
Jewels
25
24

Pricing

1 specs
MSRP
$599
$2,000

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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.

Boldr Expedition Enigmath

The watch's slide rule function is a convenient feature, allowing for calculations on the go. One potential drawback is the use of the Japanese Miyota 9039 movement, which may be a trade-off for some buyers. Reviewers disagree on whether the quick 'on the fly' adjust bracelet is a more significant advantage than the watch's sapphire crystal for durability and scratch resistance.

Seiko King Seiko KSK

Owners and reviewers widely praise the King Seiko KSK's sharp, faceted case design and harmonious mid-century aesthetic. Its compact 38.1mm or 37mm size and slim 10.7mm thickness are noted as highly wearable. However, accuracy is a point of contention, with one reviewer reporting a wide range of +25 to -15 seconds per day for the 6R31 movement, while others criticize the standard 6R movement as too thick and a departure from the brand's history. Water resistance is consistently cited as limited to 50 meters, and one owner reported misaligned screws on the caseback and clasp. On balance, owners and reviewers find the King Seiko KSK appealing for its design and wearability, though the movement choice and accuracy are significant drawbacks for some.

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