Side by side

Zelos Hammerhead (Tantalum LE)vsFormex Reef 39.5 mm

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
Reef 39.5 mm
FormexReef 39.5 mm
MSRP $2,230

At a glance

10 of 29 specs differ
Diameter
Hammerhead (Tantalum LE)44mm
Reef 39.5 mm39.5mm
Power Reserve
Hammerhead (Tantalum LE)40h
Reef 39.5 mm56h
Water Resistance
Hammerhead (Tantalum LE)300m
Reef 39.5 mm300m
MSRP
Hammerhead (Tantalum LE)$1,499
Reef 39.5 mm$2,230

Full specifications

Case

4 specs
Diameter
44mm
39.5mm
Thickness
13mm
11mm
Lug-to-Lug
44mm
45.5mm
Material
Titanium
Stainless Steel

Crystal & Dial

3 specs
Crystal
Domed Sapphire
Sapphire
Dial Color
Tantalum LE
Bahama Blue
Lume
None
Super-LumiNova

Movement

2 specs
Caliber
Seiko NH35
Sellita SW300-1
Power Reserve
40h
56h

Pricing

1 specs
MSRP
$1,499
$2,230

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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.

Formex Reef 39.5 mm

The Formex Reef 39.5 mm is widely praised for its refined finishing, comfortable and well-proportioned case design, and impressive specifications for its price point, including COSC-certified Sellita SW300-1 movement and 300m water resistance. Owners and reviewers highlight the tool-less micro-adjust clasp and quick-release spring bars as practical features. Some reviewers note that the 22mm lug width feels slightly disproportionate to the smaller case, and the bracelet could benefit from more taper, though this is a point of contention for some owners who value the overall package. A prototype crown protrusion issue is noted as being addressed for production. On balance, owners and reviewers rate the Formex Reef 39.5 mm highly for its excellent value and well-executed design.

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