Oceanica Watch Co. MakovsSeiko Prospex Sea Seiko Prospex 1965 Heritage Diver’s Watch Save the Ocean 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.

Mako

Prospex Sea Seiko Prospex 1965 Heritage Diver’s Watch Save the Ocean Limited Edition
Diameter
41mm
40mm
Lug-to-Lug
47mm
46.4mm
lowest
Thickness
13mm
13mm
Water Resistance
200m
300m
highest
Power Reserve
n/a
72h
MSRP
$320
lowest
$1,400
Movement
Seiko NH35
Seiko 6R55
Case
4 specsCrystal & Dial
4 specsMovement
3 specsPricing
1 specsReviews
Synthesized for each watch independently from owner discussions, enthusiast forums, written reviews, and video reviewers.
Owners widely praise the Oceanica Watch Co. Mako for its exceptional value and specifications, specifically noting the sapphire crystal, ceramic bezel, solid bracelet, and strong lume. The Seiko NH35 movement is present, though one owner reports typical timing fluctuations. The design is described as somewhat generic by one forum member. On balance, owners rate the Oceanica Watch Co. Mako highly for its impressive feature set and value proposition.
Owners and reviewers praise the Seiko Prospex Sea Seiko Prospex 1965 Heritage Diver’s Watch Save the Ocean Limited Edition for its compact 40mm case and improved 300-meter water resistance. The new Caliber 6R55 movement offers a 72-hour power reserve, though some owners express disappointment with its accuracy compared to ETA movements, while others accept it given Seiko's strong dial design. Press images show a disjointed fit on the bracelet's end links. Overall, owners and reviewers rate the Seiko Prospex Sea Seiko Prospex 1965 Heritage Diver’s Watch Save the Ocean Limited Edition highly for its design and wearability, despite some reservations about the movement's accuracy.
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