Filippo Loreti Watches Neptune AutomaticvsSeiko Prospex Sea 1965 Heritage Diver's Watch

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.

Filippo Loreti Watches Neptune Automatic at true scale

Neptune Automatic

Seiko Prospex Sea 1965 Heritage Diver's Watch at true scale

Prospex Sea 1965 Heritage Diver's Watch

Diameter

43mm

40mm

Lug-to-Lug

n/a

46.4mm

Thickness

12.5mm

lowest

13mm

Water Resistance

200m

300m

highest

Power Reserve

41h

72h

highest

MSRP

$445

lowest

$1,300

Movement

Seiko NH36

Seiko 6R55

Case

5 specs
Diameter
43mm
40mm
Thickness
12.5mm
13mm
Lug-to-Lug
n/a
46.4mm
Lug Width
n/a
20mm
Water Resistance
200m
300m

Crystal & Dial

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

Movement

3 specs
Caliber
Seiko NH36
Seiko 6R55
Power Reserve
41h
72h
Jewels
0
24

Pricing

1 specs
MSRP
$445
$1,300
Keep your wishlist and collection together in the appExplore the app

Reviews

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

Filippo Loreti Watches Neptune Automatic

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.

Seiko Prospex Sea 1965 Heritage Diver's Watch

Owners widely praise the Seiko Prospex Sea 1965 Heritage Diver's Watch for its refined engineering, comfortable 40mm case, and improved 300m water resistance. The watch is noted for its better build quality and finishing compared to some alternatives, featuring a mix of polished and brushed surfaces, with specific callouts for the jewel-toned teal dial with a rippling-water pattern. Some owners consider the price fair, while others suggest it is too high. Accuracy figures vary, with some owners reporting their 6R55 movement performs well within +/- 10 seconds per day, while others note theirs runs slow or have concerns about QC for the price. The bracelet, while improved, lacks modern features like quick-release or extensive micro-adjustments. Overall, owners and reviewers rate the Seiko Prospex Sea 1965 Heritage Diver's Watch highly for its refined design and build quality at its price point.