Edox Neptunian AutomaticvsSeiko 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.

Neptunian Automatic

Prospex Sea
Diameter
44mm
42mm
Lug-to-Lug
n/a
48.6mm
Thickness
15.6mm
13.3mm
lowest
Water Resistance
1000m
highest
300m
Power Reserve
n/a
72h
MSRP
$1,525
n/a
Movement
Caliber 80 (SW 200)
Seiko 6R54
Case
5 specsCrystal & Dial
2 specsMovement
3 specsPricing
1 specsReviews
Synthesized for each watch independently from owner discussions, enthusiast forums, written reviews, and video reviewers.
Owners and reviewers widely praise the Edox Neptunian Automatic for its robust build quality and impressive specifications, including 1000m water resistance and Super-LumiNova X1 for excellent low-light visibility. The 44mm stainless steel case is noted to wear surprisingly compact due to curved lugs, and its understated design is appreciated for those seeking a high-quality watch without excessive attention. The Caliber 80 automatic movement is considered reliable, and the watch features a ceramic bezel and sapphire crystal. Some owners report purchasing the Edox Neptunian Automatic at prices significantly below retail, finding its build quality excellent for the price paid. On balance, owners and reviewers rate the Edox Neptunian Automatic highly for its robust construction and impressive dive watch capabilities at a competitive price point.
The Seiko Prospex Sea is widely recognized for its excellent value and solid build quality, with many owners appreciating its classic dive watch design and legible dial. Reviewers consistently praise its lume, with one owner noting it as excellent. The watch's finishing is also a frequent highlight, described as impressive and well-executed for its price point. Some owners find the 42mm case size wears well, even on smaller wrists, while others describe it as substantial and potentially uncomfortable for smaller wrists. The movement is noted as a 6R54 automatic. Overall, owners and reviewers rate the Seiko Prospex Sea highly for its robust construction and classic dive watch aesthetics at a fair price.
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