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Kamasu vs Prospex Sea PADI Special Edition

Is the Prospex really worth $300 more?

Posted by · Jun 27, 2026
What people say

Owners + reviewers, side by side

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

Orient Kamasu

Owners widely praise the Orient Kamasu for its excellent value, robust build quality suitable for daily wear, and attractive design featuring applied indices and a sunburst dial. Reviewers and owners consistently highlight its strong lume, hacking and hand-winding movement, sapphire crystal, and sub-42mm dimensions. Some owners note a rattle, a crown that can be hard to grip, and a bezel with noticeable play or a tendency to become sticky. The bracelet is frequently criticized for its hollow end links and pressed clasp, though opinions on its taper vary. Accuracy figures reported by owners range from approximately +15 seconds per day to more precise timekeeping. Overall, owners rate the Orient Kamasu highly for its impressive finishing and features at its price point.

From video reviewers

The Orient Kamasu's compact package makes it suitable for smaller wrists without compromising wrist presence. A notable weakness is that the bracelet is decent but may have some issues, although the reviewer does not elaborate. Reviewers disagree on the value for money, with one highlighting the affordable price and in-house movement, while the other implies a trade-off in value.

Seiko Prospex Sea PADI Special Edition

The Seiko Prospex Sea PADI Special Edition is widely praised for its attractive blue and red PADI colors, rich dial aesthetic, and excellent lume that stands out even in dim environments. Owners highlight its robust build quality and excellent bezel action, noting the wave dial is a favorite. However, the Hardlex crystal and the 4R36 movement's accuracy range of +45 to -35 seconds per day are identified as compromises for the price. Some owners find the diver's extension difficult to open and the bracelet adjustment challenging, though manageable. On balance, owners and reviewers rate the Seiko Prospex Sea PADI Special Edition highly for its build quality and striking dial design at its price point.

At a glance

15 of 29 specs differ
Diameter
Kamasu41.8mm
Prospex Sea PADI Special Edition41.7mm
Power Reserve
Kamasu40h
Prospex Sea PADI Special Edition41h
Water Resistance
Kamasu200m
Prospex Sea PADI Special Edition200m
MSRP
Kamasu$375
Prospex Sea PADI Special Edition$650

Full specifications

Case

4 specs
Diameter
41.8mm
41.7mm
Thickness
12.8mm
12.3mm
Lug-to-Lug
47mm
49.5mm
Lug Width
22mm
20mm

Crystal & Dial

3 specs
Crystal
Sapphire
Hardlex
Dial Color
Green
Lume
None
LumiBrite on hands, index(es) and bezel

Movement

7 specs
Caliber
F6922
4R35
Beat Rate
21,600 vph
0 vph
Power Reserve
40h
41h
Jewels
22
23
Hacking
Yes
No
Hand-winding
Yes
No
Complications
Day-date
None

Pricing

1 specs
MSRP
$375
$650
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