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 $650

At a glance

11 of 29 specs differ
Diameter
Cahill Automatic42mm
Prospex Sea PADI Special Edition45mm
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$650

Full specifications

Case

4 specs
Diameter
42mm
45mm
Thickness
13.7mm
13.2mm
Lug-to-Lug
51mm
47.7mm
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
4R36
Power Reserve
40h
41h
Jewels
25
24

Pricing

1 specs
MSRP
$350
$650

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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

Owners widely praise the Seiko Prospex Sea PADI Special Edition for its robust build quality, excellent bezel action, and strong lume that performs well in low light. Reviewers note specific models feature attractive dials, such as the jewel-toned teal with a water pattern or a deep dark blue gradient. Some owners highlight the comfortable wearability and solid bracelets. The 4R36 movement is mentioned with a 41-hour power reserve, while the 6R55 movement offers a 72-hour power reserve and a stated accuracy of +25/-15 seconds per day. One owner finds the multi-lingual date function and divers extension difficult to use, and bracelet adjustment can be initially frustrating. On balance, owners and reviewers rate the Seiko Prospex Sea PADI Special Edition highly for its dive watch functionality and attractive dial designs.

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