Filippo Loreti Watches Eterno Automatic Blue DivervsSeiko Prospex Sea

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Measurements

Catalog photos are all shot at the same flattering size. These aren't: every case below shares one millimeter scale.

Filippo Loreti Watches Eterno Automatic Blue Diver at true scale

Eterno Automatic Blue Diver

Seiko Prospex Sea at true scale

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 specs
Diameter
42mm
41.7mm
Thickness
12.1mm
12.3mm
Lug-to-Lug
n/a
49.5mm
Lug Width
n/a
20mm
Water Resistance
100m
200m

Crystal & Dial

3 specs
Crystal
Sapphire
Hardlex
Dial Color
n/a
n/a
Lume
None
LumiBrite on hands, index(es) and bezel

Movement

3 specs
Caliber
Seiko NH35
Seiko 4R35
Power Reserve
0h
41h
Jewels
0
23

Pricing

1 specs
MSRP
$375
$595
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Reviews

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

Filippo Loreti Watches Eterno Automatic Blue Diver

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.

Seiko Prospex Sea

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.

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