Edox Neptunian AutomaticvsSeiko Prospex Sea 1968 Heritage Diver's GMT
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.

Neptunian Automatic

Prospex Sea 1968 Heritage Diver's GMT
Diameter
44mm
42mm
Lug-to-Lug
n/a
48.6mm
Thickness
15.6mm
12.9mm
lowest
Water Resistance
1000m
highest
200m
Power Reserve
n/a
72h
MSRP
$1,525
$1,500
lowest
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 1968 Heritage Diver's GMT is widely praised for its build quality, finishing, and value, with owners noting its comfortable wearability and attractive aesthetic, particularly the silver/white sunray dial and blue ceramic bezel. The improved bracelet clasp with excellent micro-adjustment is a recurring positive point. Some owners report accuracy figures of +3 seconds per day or +/- 5 seconds per day, exceeding the movement's stated range. However, the GMT functionality is considered secondary to its dive watch capabilities by some, with the GMT scale being difficult to read and the caller-style GMT movement being a drawback for certain users. The dial contrast is also noted as lacking by some, and the crown at 4 o'clock is undesirable for a few. On balance, owners and reviewers rate the Seiko Prospex Sea 1968 Heritage Diver's GMT highly for its blend of dive watch character and GMT functionality, offering significant features for its price.
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.







