Side by side

Seiko Prospex Marinemaster Marinemaster 1968 Heritage JAMSTEC Limited EditionvsLorier Neptune SIV

The numbers, the dial colors, the calibers — laid out so you can stop flipping between tabs.

At a glance

12 of 29 specs differ
Diameter
Prospex Marinemaster Marinemaster 1968 Heritage JAMSTEC Limited Edition42.6mm
Neptune SIV39mm
Power Reserve
Prospex Marinemaster Marinemaster 1968 Heritage JAMSTEC Limited Edition72h
Neptune SIV40h
Water Resistance
Prospex Marinemaster Marinemaster 1968 Heritage JAMSTEC Limited Edition300m
Neptune SIV200m
MSRP
Prospex Marinemaster Marinemaster 1968 Heritage JAMSTEC Limited Edition$3,900
Neptune SIV$599

Full specifications

Case

4 specs
Diameter
42.6mm
39mm
Thickness
14.1mm
Lug-to-Lug
49.3mm
Water Resistance
300m
200m

Crystal & Dial

4 specs
Crystal Shape
Curved
Flat
AR Coating
Anti-reflective coating on inner surface
Inner
Dial Color
Black
Standard
Lume
LumiBrite on hands, index(es) and bezel
None

Movement

3 specs
Caliber
8L45
Power Reserve
72h
40h
Jewels
35
25

Pricing

1 specs
MSRP
$3,900
$599

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What people say

Owners + reviewers, side by side

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

Seiko Prospex Marinemaster Marinemaster 1968 Heritage JAMSTEC Limited Edition

The Seiko Prospex Marinemaster Marinemaster 1968 Heritage JAMSTEC Limited Edition is praised for its distinctive blue sea ice-inspired dial with a gradient effect and textured finish, celebrating its partnership with JAMSTEC. It is powered by the automatic Calibre 8L45 movement, which provides a 72-hour power reserve. The watch features a 42.6mm stainless steel case with a super-hard coating, a ceramic bezel, and a dual-curved sapphire crystal, offering 300m water resistance. Accuracy is rated between -5/+10 seconds per day. Overall, reviewers highlight the unique dial design and robust specifications as key strengths of the Seiko Prospex Marinemaster Marinemaster 1968 Heritage JAMSTEC Limited Edition.

Lorier Neptune SIV

Owners widely praise the Lorier Neptune SIV for its versatile, vintage-inspired design featuring a glossy gilt-style dial and a comfortable, tapered bracelet, noting its affordability reduces wear anxiety. Reviewers and owners alike mention the acrylic crystal as a point of contention, with some preferring sapphire, and one owner finds the bracelet lacks the feel of more expensive options. On balance, owners and reviewers rate the Lorier Neptune SIV highly for its appealing vintage aesthetic and value proposition.

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