Side by side

Zelos Hammerhead (Tantalum LE)vsSeiko Monster

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
Monster
SeikoMonster
MSRP $550

At a glance

13 of 29 specs differ
Diameter
Hammerhead (Tantalum LE)44mm
Monster42.4mm
Power Reserve
Hammerhead (Tantalum LE)40h
Monster41h
Water Resistance
Hammerhead (Tantalum LE)300m
Monster200m
MSRP
Hammerhead (Tantalum LE)$1,499
Monster$550

Full specifications

Case

6 specs
Diameter
44mm
42.4mm
Thickness
13mm
13.4mm
Lug-to-Lug
44mm
49.4mm
Lug Width
22mm
20mm
Material
Titanium
Stainless Steel
Water Resistance
300m
200m

Crystal & Dial

3 specs
Crystal
Domed Sapphire
Hardlex
Dial Color
Tantalum LE
Black
Lume
None
LumiBrite on hands, index(es) and bezel

Movement

3 specs
Caliber
Seiko NH35
4R36
Power Reserve
40h
41h
Jewels
25
24

Pricing

1 specs
MSRP
$1,499
$550

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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.

Seiko Monster

Owners widely praise the Seiko Prospex Sea for its excellent value, robust build, and superb lume, with many noting its comfortable wearability. Reviewers consistently highlight its impressive finishing and classic dive watch design, often comparing it favorably to older models. Some owners find the size substantial, with one noting it as big, thick, and heavy on a 6.5-inch wrist, while others find it perfect. On balance, owners and reviewers rate the Seiko Prospex Sea highly for its exceptional value and robust, classic dive watch design.

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