Which is cheaper, the Zelos Hammerhead (Tantalum LE) or the Seiko Prospex SPEEDTIMER Mechanical Chronograph?

At MSRP the Zelos Hammerhead (Tantalum LE) is the cheaper of the two at $1,499, against $2,500 for the Seiko Prospex SPEEDTIMER Mechanical Chronograph — a $1,001 gap before any retailer discounting.

Which is bigger, the Zelos Hammerhead (Tantalum LE) or the Seiko Prospex SPEEDTIMER Mechanical Chronograph?

The Zelos Hammerhead (Tantalum LE) wears larger at 44mm versus 42mm for the Seiko Prospex SPEEDTIMER Mechanical Chronograph — a 2mm difference across the dial.

Which has better water resistance, the Zelos Hammerhead (Tantalum LE) or the Seiko Prospex SPEEDTIMER Mechanical Chronograph?

The Zelos Hammerhead (Tantalum LE) is rated to 300m versus 10m for the Seiko Prospex SPEEDTIMER Mechanical Chronograph.

Which has a longer power reserve, the Zelos Hammerhead (Tantalum LE) or the Seiko Prospex SPEEDTIMER Mechanical Chronograph?

The Seiko Prospex SPEEDTIMER Mechanical Chronograph carries a 45-hour power reserve against 40 hours on the Zelos Hammerhead (Tantalum LE).

What movement does the Zelos Hammerhead (Tantalum LE) run compared to the Seiko Prospex SPEEDTIMER Mechanical Chronograph?

Both watches run automatic movements — the Zelos Hammerhead (Tantalum LE) uses the Seiko NH35 and the Seiko Prospex SPEEDTIMER Mechanical Chronograph uses the 8R48.

Side by side

Zelos Hammerhead (Tantalum LE)vsSeiko Prospex SPEEDTIMER Mechanical Chronograph

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

Zelos Hammerhead (Tantalum LE)

hammerhead-v3-300m-tantalum-limited-edition

MSRP $1,499

Seiko Prospex SPEEDTIMER Mechanical Chronograph

srq047j1

MSRP $2,500

At a glance

16 of 29 specs differ

Diameter

Hammerhead (Tantalum LE)44mm

Prospex SPEEDTIMER Mechanical Chronograph42mm

Power Reserve

Hammerhead (Tantalum LE)40h

Prospex SPEEDTIMER Mechanical Chronograph45h

Water Resistance

Hammerhead (Tantalum LE)300m

Prospex SPEEDTIMER Mechanical Chronograph100m

MSRP

Hammerhead (Tantalum LE)$1,499

Prospex SPEEDTIMER Mechanical Chronograph$2,500

Full specifications

Case

7 specs

Crystal & Dial

5 specs

Crystal

Domed Sapphire

Sapphire

Crystal Shape

Flat

Curved

AR Coating

Inner

Anti-reflective coating on inner surface

Dial Color

Tantalum LE

Black

Lume

None

LumiBrite on hands and index(es)

Movement

3 specs

Caliber

Seiko NH35

8R48

Power Reserve

40h

45h

Jewels

Pricing

1 specs

MSRP

$1,499

$2,500

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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.

WatchUSeek

Fratello

Seiko Prospex SPEEDTIMER Mechanical Chronograph

The Seiko Prospex SPEEDTIMER Mechanical Chronograph is praised for its handsome, heritage-inspired design with a clean, balanced dial and an external tachymeter bezel. Reviewers highlight the upgraded case and bracelet, noting improved comfort and good value for a well-designed chronograph with an in-house movement. The caliber 8R48 movement features a vertical clutch and column wheel with MEMS technology for durability and precision. Points to consider include the 4:30 date window and a 14.6mm thickness, while the 45-hour power reserve is noted as an area for potential improvement. On balance, reviewers find the Seiko Prospex SPEEDTIMER Mechanical Chronograph to be a solid offering with good value, particularly for its design and in-house movement.

Hodinkee

Monochrome

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