Side by side

Seiko Prospex SeavsZelos Helica

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

What people say

Owners + reviewers, side by side

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

Seiko Prospex Sea

Owners and reviewers widely praise the Seiko Prospex Sea for its excellent value, robust build, and superior lume, with many noting its comfortable wearability and faithful design recreations. Some owners report the watch can feel big, thick, and heavy on smaller wrists, while others find the sizing perfect. The bezel action is frequently highlighted as smooth and precise, often exceeding that of less expensive models. On balance, owners and reviewers rate the Seiko Prospex Sea highly for its impressive finishing and value proposition.

Zelos Helica

Owners widely praise the Zelos Helica for its stunning, often color-shifting dials, with specific mentions of the MoP, slate grey, 'Steel Blue', and red opal variants being particularly captivating and artful. The 39mm case size is noted as fitting well on smaller wrists, and the overall build quality and finishing for the price are frequently highlighted as impressive, with one owner calling it "a lot of watch for the price." Some owners appreciate the novel bracelet designs and full lume dials, while others find the bracelet and clasp edges sharp or the clasp lacking on-the-fly adjustment. Opinions on the date window are mixed, with one owner disliking it. The Zelos Helica Moonphase was considered cluttered by one owner, and its $1K USD price point was felt to be steep by another, though popular variants sold out rapidly. Overall, owners rate the Zelos Helica highly for its striking dial designs and impressive value proposition.

At a glance

12 of 29 specs differ
Diameter
Prospex Sea41.7mm
Helica39mm
Power Reserve
Prospex Sea41h
Helica
Water Resistance
Prospex Sea200m
Helica100m
MSRP
Prospex Sea$595
Helica$499

Full specifications

Case

5 specs
Diameter
41.7mm
39mm
Thickness
12.3mm
10.5mm
Lug-to-Lug
49.5mm
39mm
Material
Stainless Steel
316L Stainless Steel
Water Resistance
200m
100m

Crystal & Dial

3 specs
Crystal
Hardlex
Sapphire
Dial Color
39 - Wave MOP
Lume
LumiBrite on hands, index(es) and bezel
None

Movement

3 specs
Caliber
4R35
Miyota 9015
Power Reserve
41h
0h
Jewels
23
0

Pricing

1 specs
MSRP
$595
$499
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