Heimdallr Sharkey Mini Turtle DivervsSeiko Prospex Sea PADI 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.

Heimdallr Sharkey Mini Turtle Diver at true scale

Sharkey Mini Turtle Diver

Seiko Prospex Sea PADI Special Edition at true scale

Prospex Sea PADI Special Edition

Diameter

45.5mm

43.8mm

Lug-to-Lug

47.7mm

lowest

48.7mm

Thickness

13.3mm

12.8mm

lowest

Water Resistance

200m

200m

Power Reserve

n/a

41h

MSRP

$149

lowest

$625

Movement

Hangzhou 2553A

Seiko 4R35

Case

3 specs
Diameter
45.5mm
43.8mm
Thickness
13.3mm
12.8mm
Lug-to-Lug
47.7mm
48.7mm

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
Hangzhou 2553A
Seiko 4R35
Power Reserve
0h
41h
Jewels
0
23

Pricing

1 specs
MSRP
$149
$625
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Reviews

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

Heimdallr Sharkey Mini Turtle Diver

Owners widely praise the Heimdallr SHARKEY Mini Turtle Dive Watch for its excellent finishing and surprising reliability, with many noting its good wearability and comfortable fit for its 45.5mm case size. The lume is generally considered strong, and the included rubber strap is well-regarded, with some owners opting to keep it. Accuracy figures vary, with one owner reporting +6 seconds per day and another seeing +-2 seconds per day, while one owner experienced losing a couple of minutes daily with poor lume. The bezel action is described as not as refined as higher-end watches, and one owner noted a slightly misaligned bezel. Overall, owners rate the Heimdallr SHARKEY Mini Turtle Dive Watch highly for its value, build quality, and satisfying Turtle-style aesthetic.

Seiko Prospex Sea PADI Special Edition

Owners praise the Seiko Prospex Sea PADI Special Edition for its attractive, jewel-toned teal dial with an ocean-mimicking pattern and LumiBrite for legibility. Some reviewers note the watch offers good value under $1,000 with a rich dial aesthetic and refined case. The 43.8mm case is considered a bit thick by some, and its design can make the watch wear top-heavy and feel larger than its dimensions suggest, with a lug-to-lug that might be long for smaller wrists. The 4R35 movement's stated accuracy range is broad, with some owners seeing +/- 15-25 seconds per day. Overall, owners and reviewers rate the Seiko Prospex Sea PADI Special Edition highly for its vibrant dial and solid build at its price point.