Filippo Loreti Watches Neptune AutomaticvsSeiko 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.

Neptune Automatic

Prospex Sea
Diameter
43mm
43.8mm
Lug-to-Lug
n/a
48.7mm
Thickness
12.5mm
lowest
12.8mm
Water Resistance
200m
200m
Power Reserve
41h
41h
MSRP
$445
lowest
$625
Movement
Seiko NH36
Seiko 4R35
Case
4 specsCrystal & Dial
3 specsMovement
2 specsPricing
1 specsReviews
Synthesized for each watch independently from owner discussions, enthusiast forums, written reviews, and video reviewers.
Owners widely report the Filippo Loreti Neptune Automatic feels light and empty for its price, with one owner noting it sets forward about a minute weekly. Some owners suggest better value and quality can be found in microbrands, with one owner stating the watch is Chinese and worth under $100. Concerns are raised about the brand's marketing, lack of heritage, and reports of poor customer service. On balance, owners find the Filippo Loreti Neptune Automatic to be a beautiful watch but question its value proposition and perceived quality.
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.
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.








