Seiko Prospex Marinemaster Marinemaster 1968 Heritage JAMSTEC Limited EditionvsSeL Instrument OmniDiver MK2 Auto
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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.
Prospex Marinemaster Marinemaster 1968 Heritage JAMSTEC Limited Edition
OmniDiver MK2 Auto
Diameter
42.6mm
46mm
Lug-to-Lug
49.3mm
n/a
Thickness
14.1mm
n/a
Water Resistance
300m
highest
200m
Power Reserve
72h
n/a
MSRP
$3,900
lowest
$5,975
Movement
Seiko 8L45
Sellita SW200-1
Case
6 specsCrystal & Dial
3 specsMovement
3 specsPricing
1 specsReviews
Synthesized for each watch independently from owner discussions, enthusiast forums, written reviews, and video reviewers.
The Seiko Prospex Marinemaster Marinemaster 1968 Heritage JAMSTEC Limited Edition is praised for its blue sea ice-inspired dial and bezel, celebrating Seiko's partnership with JAMSTEC. It is powered by the automatic Seiko 8L45 movement, has a 72-hour power reserve, and an accuracy rating ranging from -5/+10 seconds per day. The watch features a 42.6mm stainless steel case with a super-hard coating, a ceramic bezel, and a dual-curved sapphire crystal. On balance, reviewers highlight the unique dial design and technical specifications as key strengths of the Seiko Prospex Marinemaster Marinemaster 1968 Heritage JAMSTEC Limited Edition.
Owners widely praise the SeL Instrument OmniDiver MK2 Auto's great and exceptionally bright lume, and the 6,100-meter Grade 5 titanium case. One reviewer noted the exceptionally smooth winding action and a fully lumed bezel with no back play. Owners consider the OmniDiver MK2 Auto fairly expensive at its base price point. Overall, owners rate the SeL Instrument OmniDiver MK2 Auto highly for its bright lume and titanium case construction.
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