Aerotec Watches Aerotec Ace X GMT DivervsSeiko Prospex Marinemaster Marinemaster 1968 Heritage JAMSTEC Limited Edition
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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.
Aerotec Ace X GMT Diver
Prospex Marinemaster Marinemaster 1968 Heritage JAMSTEC Limited Edition
Diameter
41.5mm
42.6mm
Lug-to-Lug
n/a
49.3mm
Thickness
n/a
14.1mm
Water Resistance
200m
300m
highest
Power Reserve
n/a
72h
MSRP
$459
lowest
$3,900
Movement
Seiko NH34
Seiko 8L45
Case
6 specsCrystal & Dial
5 specsMovement
3 specsPricing
1 specsReviews
Synthesized for each watch independently from owner discussions, enthusiast forums, written reviews, and video reviewers.
The Aerotec Ace X GMT Diver is praised for its excellent timekeeping from the Seiko NH34 movement, with one owner reporting immaculate condition after minimal wear. The watch features a 41.5mm case and 200m water resistance. Overall, owners rate the Aerotec Ace X GMT Diver highly for its reliable Seiko NH34 movement and solid build quality.
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.
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