Side by side

Zelos Hammerhead (Tantalum LE)vsSpinnaker Cahill Automatic

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

Hammerhead (Tantalum LE)
ZelosHammerhead (Tantalum LE)
MSRP $1,499
Cahill Automatic
SpinnakerCahill Automatic
MSRP $350

At a glance

9 of 29 specs differ
Diameter
Hammerhead (Tantalum LE)44mm
Cahill Automatic42mm
Power Reserve
Hammerhead (Tantalum LE)40h
Cahill Automatic40h
Water Resistance
Hammerhead (Tantalum LE)300m
Cahill Automatic200m
MSRP
Hammerhead (Tantalum LE)$1,499
Cahill Automatic$350

Full specifications

Case

5 specs
Diameter
44mm
42mm
Thickness
13mm
13.7mm
Lug-to-Lug
44mm
51mm
Material
Titanium
316L Stainless Steel
Water Resistance
300m
200m

Crystal & Dial

2 specs
Crystal
Domed Sapphire
Sapphire
Dial Color
Tantalum LE
Green

Movement

1 specs
Caliber
Seiko NH35
SII NH35A

Pricing

1 specs
MSRP
$1,499
$350

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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.

Zelos Hammerhead (Tantalum LE)

The Zelos Hammerhead (Tantalum LE) features a forged carbon dial and bezel insert with infused lume. On balance, owners and reviewers rate the Zelos Hammerhead (Tantalum LE) highly for its unique material composition and substantial feel.

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.

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