Which is bigger, the Seiko Prospex Sea or the Hemel Sky Racer Mechanical?

The Hemel Sky Racer Mechanical wears larger at 43mm versus 42mm for the Seiko Prospex Sea — a 1mm difference across the dial.

Which has better water resistance, the Seiko Prospex Sea or the Hemel Sky Racer Mechanical?

The Seiko Prospex Sea is rated to 300m versus 50m for the Hemel Sky Racer Mechanical.

Which has a longer power reserve, the Seiko Prospex Sea or the Hemel Sky Racer Mechanical?

The Seiko Prospex Sea carries a 72-hour power reserve against 40 hours on the Hemel Sky Racer Mechanical.

What movement does the Seiko Prospex Sea run compared to the Hemel Sky Racer Mechanical?

The Seiko Prospex Sea runs a automatic caliber (6R54), while the Hemel Sky Racer Mechanical runs a manual (Seagull ST19).

Side by side

Seiko Prospex SeavsHemel Sky Racer Mechanical

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

Seiko Prospex Sea

hbc001j1

Hemel Sky Racer Mechanical

HF37MNB

MSRP $550

At a glance

14 of 29 specs differ

Diameter

Prospex Sea42mm

Sky Racer Mechanical43mm

Power Reserve

Prospex Sea72h

Sky Racer Mechanical40h

Water Resistance

Prospex Sea300m

Sky Racer Mechanical50m

MSRP

Prospex Sea—

Sky Racer Mechanical$550

Full specifications

Case

6 specs

Crystal & Dial

3 specs

Crystal

Sapphire

Domed Sapphire

AR Coating

Anti-reflective coating on inner surface

Inner

Lume

LumiBrite on hands, index(es) and bezel

None

Movement

4 specs

Caliber

6R54

Seagull ST19

Type

Automatic

Manual

Power Reserve

72h

40h

Jewels

Pricing

1 specs

MSRP

—

$550

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Seiko Prospex SeavsHemel Sky Racer Mechanical

At a glance

Full specifications

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