Side by side

Spinnaker Cahill AutomaticvsSeiko Prospex Sea PADI Special Edition

The numbers, the dial colors, the calibers — laid out so you can stop flipping between tabs.

Cahill Automatic
SpinnakerCahill Automatic
MSRP $350
Prospex Sea PADI Special Edition
SeikoProspex Sea PADI Special Edition
MSRP $625

At a glance

11 of 29 specs differ
Diameter
Cahill Automatic42mm
Prospex Sea PADI Special Edition43.8mm
Power Reserve
Cahill Automatic40h
Prospex Sea PADI Special Edition41h
Water Resistance
Cahill Automatic200m
Prospex Sea PADI Special Edition200m
MSRP
Cahill Automatic$350
Prospex Sea PADI Special Edition$625

Full specifications

Case

4 specs
Diameter
42mm
43.8mm
Thickness
13.7mm
12.8mm
Lug-to-Lug
51mm
48.7mm
Material
316L Stainless Steel
Stainless Steel

Crystal & Dial

3 specs
AR Coating
Inner
Anti-reflective coating on inner surface
Dial Color
Green
Black
Lume
None
LumiBrite on hands, index(es) and bezel

Movement

3 specs
Caliber
SII NH35A
4R35
Power Reserve
40h
41h
Jewels
25
23

Pricing

1 specs
MSRP
$350
$625

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What people say

Owners + reviewers, side by side

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

Spinnaker Cahill Automatic

Owners widely praise the Spinnaker Cahill Automatic for its attractive vintage-inspired design, comfortable wearability on smaller wrists, and good timekeeping, with one owner specifically noting the large "maxi" indices and NATO strap as highlights. However, some find the lume application uneven and note the use of a mineral crystal. A significant concern raised by one owner is a report of internal component failures and a perceived lack of quality control within the brand. On balance, the Spinnaker Cahill Automatic is well-regarded by owners for its style and value, particularly at specific price points, despite some noted manufacturing inconsistencies.

Seiko Prospex Sea PADI Special Edition

The Seiko Prospex Sea PADI Special Edition is widely praised for its attractive, jewel-toned teal or emerald green dials with wave patterns and vibrant PADI color schemes. Owners and reviewers note its solid build quality, refined case, and good value, with some highlighting the laser-engraved bezel numerals and LumiBrite for legibility. The 6R55 movement offers a 72-hour power reserve, while the 6R15 provides 50 hours. Accuracy figures vary, with the 6R55 rated +25/-15 seconds per day and the 6R15 around +/- 15-25 seconds per day. Some find the lug-to-lug measurement, around 49.5mm, potentially long for smaller wrists, and one owner noted a unique case design made the watch wear top-heavy. Another owner found the finishing and bracelet design basic. Overall, owners and reviewers appreciate the Seiko Prospex Sea PADI Special Edition for its striking dial aesthetics and solid dive watch construction at its price point.

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