Seiko Prospex SeavsUndone Rikishi Aka

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Prospex Sea
SeikoProspex Sea

MSRP $900

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Rikishi Aka
UndoneRikishi Aka

MSRP $595

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Measurements

Catalog photos are all shot at the same flattering size. These aren't: every case below shares one millimeter scale.

Seiko Prospex Sea at true scale

Prospex Sea

Undone Rikishi Aka at true scale

Rikishi Aka

Diameter

41mm

40mm

Lug-to-Lug

46.9mm

n/a

Thickness

12.3mm

lowest

13.8mm

Water Resistance

200m

highest

100m

Power Reserve

70h

n/a

MSRP

$900

$595

lowest

Movement

Seiko 6R35

Seiko NE57

Case

6 specs
Category
Diver
Sport
Diameter
41mm
40mm
Thickness
12.3mm
13.8mm
Lug-to-Lug
46.9mm
n/a
Lug Width
20mm
n/a
Water Resistance
200m
100m

Crystal & Dial

4 specs
Crystal Shape
Curved
n/a
AR Coating
Anti-reflective coating on inner surface
n/a
Dial Color
n/a
n/a
Lume
LumiBrite on hands, index(es) and bezel
None

Movement

3 specs
Caliber
Seiko 6R35
Seiko NE57
Power Reserve
70h
0h
Jewels
24
0

Pricing

1 specs
MSRP
$900
$595
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