Side by side

Halios Universa IIvsSeiko Prospex Sea Save the Ocean Special Edition

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

Universa II
HaliosUniversa II
MSRP $995

At a glance

15 of 29 specs differ
Diameter
Universa II38mm
Prospex Sea Save the Ocean Special Edition45mm
Power Reserve
Universa II40h
Prospex Sea Save the Ocean Special Edition41h
Water Resistance
Universa II100m
Prospex Sea Save the Ocean Special Edition200m
MSRP
Universa II$995
Prospex Sea Save the Ocean Special Edition$625

Full specifications

Case

7 specs
Category
Dress
Diver
Diameter
38mm
45mm
Thickness
11.8mm
13.2mm
Lug-to-Lug
48mm
47.7mm
Lug Width
20mm
22mm
Material
316L Stainless Steel
Stainless Steel
Water Resistance
100m
200m

Crystal & Dial

4 specs
Crystal
Sapphire (double-domed)
Sapphire
AR Coating
Inner
Anti-reflective coating on inner surface
Dial Color
Gold
Black
Lume
None
LumiBrite on hands, index(es) and bezel

Movement

3 specs
Caliber
Sellita SW300-1
4R36
Power Reserve
40h
41h
Jewels
25
24

Pricing

1 specs
MSRP
$995
$625

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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.

Halios Universa II

Owners widely praise the Halios Universa II for its applied indices, excellent finishing for the price, and comfortable 38mm dimensions. The integrated bracelet design with a satisfying micro-adjust clasp and case architecture are described as masterclasses. However, some find the bracelet clasp chunkier than the overall design, and the angular lug design is noted as not being for everyone. One owner reported unexpected pastel dial colors and a poor winding action. On balance, owners rate the Halios Universa II highly for its applied indices and excellent finishing at the price point.

Seiko Prospex Sea Save the Ocean Special Edition

The Seiko Prospex Sea Save the Ocean Special Edition is widely praised for its attractive, unique, and textured dials, often described as having a "Grand Seiko feel" at a more accessible price point, with specific mentions of wave patterns, lagoon hues, and manta ray motifs. Owners appreciate the smooth bezel operation and satisfactory lume. Accuracy figures vary, with one owner reporting +5 seconds per day, while another notes a range from +1/+2 to about -6 seconds per day. The 6R35 movement offers a 70-hour power reserve, and some models feature sapphire crystals. Criticisms include a desire for exhibition casebacks and concerns about the quality and security of the stamped metal clasps and bracelets, which are frequently described as rattly or underwhelming, though this is noted as a common Seiko trait. Some owners are split on the number of Save the Ocean variations and dislike the cyclops magnifier.

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