Side by side

Boldr Expedition EnigmathvsSeiko Prospex Sea

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

Expedition Enigmath
BoldrExpedition Enigmath
MSRP $599
Prospex Sea
SeikoProspex Sea
MSRP $900

At a glance

11 of 29 specs differ
Diameter
Expedition Enigmath41mm
Prospex Sea41mm
Power Reserve
Expedition Enigmath42h
Prospex Sea70h
Water Resistance
Expedition Enigmath200m
Prospex Sea200m
MSRP
Expedition Enigmath$599
Prospex Sea$900

Full specifications

Case

3 specs
Category
Tool
Diver
Thickness
12.8mm
12.3mm
Lug-to-Lug
47.5mm
46.9mm

Crystal & Dial

4 specs
Crystal Shape
Flat
Curved
AR Coating
Yes
Anti-reflective coating on inner surface
Dial Color
Enigmath Coconino
Black
Lume
Super-LumiNova
LumiBrite on hands, index(es) and bezel

Movement

3 specs
Caliber
Miyota 9039,
6R35
Power Reserve
42h
70h
Jewels
25
24

Pricing

1 specs
MSRP
$599
$900

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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 Prospex Sea

Owners widely praise the Seiko Prospex Sea for its excellent lume, robust build, and value, with many highlighting the comfortable 4 o'clock crown and reliable movements. Reviewers note impressive case finishing and attractive dials, with specific models lauded for their gradient blue designs and smooth bezel actions. Accuracy figures vary, with one owner reporting +9 seconds/day after demagnetization, while others find the watches to be good first "proper" watches. Some owners find the stock rubber straps uncomfortable or the overall size substantial on smaller wrists. On balance, owners and reviewers rate the Seiko Prospex Sea highly for its combination of strong dive watch functionality and appealing design at its price point.

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