Filippo Loreti Watches Eterno Automatic Blue DivervsSeiko Prospex Sea
lug2lug doesn't sell watches. Buy links open the brand's or seller's own site. Some links are affiliate links: lug2lug may earn a commission at no extra cost to you. Disclosures
Measurements
Catalog photos are all shot at the same flattering size. These aren't: every case below shares one millimeter scale.

Eterno Automatic Blue Diver

Prospex Sea
Diameter
42mm
41.7mm
Lug-to-Lug
n/a
49.5mm
Thickness
12.1mm
lowest
12.3mm
Water Resistance
100m
200m
highest
Power Reserve
n/a
41h
MSRP
$375
lowest
$595
Movement
Seiko NH35
Seiko 4R35
Case
5 specsCrystal & Dial
3 specsMovement
3 specsPricing
1 specsReviews
Synthesized for each watch independently from owner discussions, enthusiast forums, written reviews, and video reviewers.
Owners widely report significant shipping delays and poor quality control, with some experiencing watches stopping working within a year and customer service offering no resolution. The brand is frequently described as a fashion or "drop shipper" brand rather than a serious watchmaker, with criticisms leveled at aggressive marketing and claims of Italian design when movements are Japanese. Some owners find the watches beautiful and appreciate features like sapphire crystal, while others consider them overpriced and not worth more than $40-$50. On balance, owners and community members express significant concerns regarding value and reliability, leading many to advise avoiding the brand.
Owners widely report the Seiko Prospex Sea is a well-built watch at a fair price, with some finding its 41.7mm case size perfect while others with smaller wrists consider it big, thick, and heavy. Reviewers consistently praise the excellent lume and robust design. One owner notes the bezel action is smoother and more precise than some other Seiko divers. Overall, owners and reviewers rate the Seiko Prospex Sea highly for its value and proven design.
Similar watches
Matched to the watches above on size, movement, style and price, microbrands first. Open any one to dig in.
Also compared
Comparisons nearby in the catalog: alternatives to the watches above paired against the matchup.









