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.

Oceanica Watch Co. Mako at true scale

Mako

Seiko Prospex Sea Seiko Prospex 1965 Heritage Diver’s Watch Save the Ocean Limited Edition at true scale

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 specs
Diameter
41mm
40mm
Lug-to-Lug
47mm
46.4mm
Lug Width
n/a
20mm
Water Resistance
200m
300m

Crystal & Dial

4 specs
Crystal Shape
n/a
Curved
AR Coating
n/a
Anti-reflective coating on inner surface
Dial Color
Blue
n/a
Lume
C3
LumiBrite on hands, index(es) and bezel

Movement

3 specs
Caliber
Seiko NH35
Seiko 6R55
Power Reserve
n/a
72h
Jewels
0
24

Pricing

1 specs
MSRP
$320
$1,400
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Reviews

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

Oceanica Watch Co. Mako

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.

Seiko Prospex Sea Seiko Prospex 1965 Heritage Diver’s Watch Save the Ocean Limited Edition

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.