Borealis Watch Co. Bull Shark V2vsSeiko Prospex Marinemaster 1965 Heritage Diver's Watch
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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.
Bull Shark V2
Prospex Marinemaster 1965 Heritage Diver's Watch
Diameter
38mm
39.5mm
Lug-to-Lug
47mm
lowest
47.2mm
Thickness
12.6mm
12.3mm
lowest
Water Resistance
300m
highest
200m
Power Reserve
n/a
45h
MSRP
$495
lowest
$2,800
Movement
Miyota 9039
Seiko 6L37
Case
4 specsCrystal & Dial
3 specsMovement
3 specsPricing
1 specsReviews
Synthesized for each watch independently from owner discussions, enthusiast forums, written reviews, and video reviewers.
The red bezel is a standout feature. The watch wears small, which is a concern for larger wrists.
The Seiko Prospex Marinemaster Marinemaster 1965 Heritage Diver's Watch is praised for its modern execution of a classic design, with reviewers noting the appealing 39.5mm case size and updated bracelet that improve wearability. Some reviewers mention the 6L37 movement has a 46-hour power reserve, with accuracy rated around -10/+15 seconds per day. A drawback identified by reviewers is the lack of tool-free micro-adjustment on the clasp. Overall, owners and reviewers find the Seiko Prospex Marinemaster Marinemaster 1965 Heritage Diver's Watch to be a handsome re-interpretation of a beloved design, with its improved wearability being a key strength.
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