Cronos Sub DivervsSeiko 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.

Cronos Sub Diver at true scale

Sub Diver

Seiko Prospex Sea Save the Ocean Special Edition at true scale

Prospex Sea Save the Ocean Special Edition

Diameter

44mm

45mm

Lug-to-Lug

51.9mm

47.7mm

lowest

Thickness

16.5mm

13.2mm

lowest

Water Resistance

2000m

highest

200m

Power Reserve

n/a

41h

MSRP

$218

lowest

$625

Movement

PT5000

Seiko 4R36

Case

7 specs
Diameter
44mm
45mm
Thickness
16.5mm
13.2mm
Lug-to-Lug
51.9mm
47.7mm
Lug Width
21mm
22mm
Material
316L Stainless Steel
Stainless Steel
Finish
316L stainless steel
n/a
Water Resistance
2000m
200m

Crystal & Dial

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

Movement

5 specs
Caliber
PT5000
Seiko 4R36
Power Reserve
0h
41h
Jewels
0
24
Hacking
Yes
No
Hand-winding
Yes
No

Pricing

1 specs
MSRP
$218
$625
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Reviews

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

Cronos Sub Diver

Owners praise the Cronos Sub Diver 44mm Date (L6027) for its substantial 44mm size, making it suitable for larger wrists, and its surprisingly comfortable wear despite a 17mm thickness. One owner prefers the printed dial of this specific configuration over applied indices found on other variants. The watch is noted for offering superb value and has successfully undergone a 3000m water resistance test. On balance, owners rate the Cronos Sub Diver 44mm Date (L6027) highly for its comfortable wear and strong value proposition.

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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