Ianos AvyssosvsSeiko Prospex Sea

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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.

Ianos Avyssos at true scale

Avyssos

Seiko Prospex Sea at true scale

Prospex Sea

Diameter

44mm

43.8mm

Lug-to-Lug

54mm

48.7mm

lowest

Thickness

n/a

12.8mm

Water Resistance

300m

highest

200m

Power Reserve

42h

highest

41h

MSRP

$1,257

$625

lowest

Movement

Sellita SW216-1

Seiko 4R35

Case

5 specs
Diameter
44mm
43.8mm
Thickness
n/a
12.8mm
Lug-to-Lug
54mm
48.7mm
Lug Width
n/a
22mm
Water Resistance
300m
200m

Crystal & Dial

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

Movement

4 specs
Caliber
Sellita SW216-1
Seiko 4R35
Type
Manual
Automatic
Power Reserve
42h
41h
Jewels
0
23

Pricing

1 specs
MSRP
$1,257
$625
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Reviews

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

Ianos Avyssos

The Ianos Avyssos is recognized for its historically inspired design, featuring a sandwich dial with lume visible through cut-out markers and a small seconds disc referencing the Antikythera mechanism, alongside hour markers shaped like Greek sponge diver ballast stones. Reviewers note its 44mm angular case with a PVD finish and a blue-to-black dégradé dial. One reviewer flags a disconcerting ratcheting click when tightening the crown. An owner mentions the strap's durability for diving but notes a NATO is included. On balance, owners and reviewers appreciate the Ianos Avyssos for its unique historical design and solid construction at its price point.

Seiko Prospex Sea

The Seiko Prospex Sea is widely praised for its excellent value as a sport watch, with owners highlighting its comfortable wearability and generous lume. Reviewers note its solid build quality and attractive design, with some specifically mentioning the matte black dial as a strong point. One owner reports accuracy around +1 to +2 seconds per day. The 43.8mm case size is considered substantial by some, and one owner found the watch heavy and thick, regretting not choosing a different variant. Overall, owners and reviewers rate the Seiko Prospex Sea highly for its blend of classic design and modern utility at an accessible price point.