Certina DS Action Diver ChronovsSeiko Prospex Sea Save the Ocean Special 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.

Certina DS Action Diver Chrono at true scale

DS Action Diver Chrono

Seiko Prospex Sea Save the Ocean Special Edition at true scale

Prospex Sea Save the Ocean Special Edition

Diameter

44.6mm

45mm

Lug-to-Lug

52.6mm

47.7mm

lowest

Thickness

16.2mm

13.2mm

lowest

Water Resistance

300m

highest

200m

Power Reserve

n/a

41h

MSRP

$2,219

$625

lowest

Movement

Tissot Valjoux A05.231

Seiko 4R36

Case

5 specs
Diameter
44.6mm
45mm
Thickness
16.17mm
13.2mm
Lug-to-Lug
52.58mm
47.7mm
Lug Width
21mm
22mm
Water Resistance
300m
200m

Crystal & Dial

2 specs
AR Coating
n/a
Anti-reflective coating on inner surface
Lume
None
LumiBrite on hands, index(es) and bezel

Movement

3 specs
Caliber
Tissot Valjoux A05.231
Seiko 4R36
Power Reserve
0h
41h
Jewels
0
24

Pricing

1 specs
MSRP
$2,219
$625
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Reviews

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

Certina DS Action Diver Chrono

Owners widely praise the Certina DS Action Diver Chrono for its excellent value and high-end feel, with many considering it one of the best Swiss or Japanese divers under $2000. Reviewers and owners alike highlight its robust build, attractive design, and well-finished case, with some preferring the contrast of the steel version for readability. One owner notes the chronograph totaliser lacks lume, and another finds the 21mm lug width inconvenient for strap changes. The Certina DS Action Diver Chrono is powered by the Tissot Valjoux A05.231 automatic movement and has a 68-hour power reserve, though one owner mentions a low reserve requiring daily winding if not worn extensively. Overall, owners rate the Certina DS Action Diver Chrono highly for its exceptional quality and value at its price point.

Seiko Prospex Sea Save the Ocean Special Edition

The Seiko Prospex Sea Save the Ocean Special Edition is widely praised for its exceptional and unique dial designs, often described as a highlight with wave patterns, lagoon hues, or even manta rays, offering a "Grand Seiko feel" at a regular Seiko price. Owners and reviewers consistently note the attractive color combinations and textured appearances, making it a standout feature. The watch is generally considered solidly built and good value, with satisfactory lume and smooth bezel operation. However, the bracelet and clasp are frequently criticized as underwhelming, rattly, and lacking a convenient diver's extension, a common complaint across several Seiko models. Some owners also express a desire for exhibition casebacks or note potential quality control issues such as misaligned bezels or day/date wheels. Overall, owners and reviewers rate the Seiko Prospex Sea Save the Ocean Special Edition highly for its visually striking and unique dial designs at an accessible price point.

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