Which is cheaper, the Hemel Sky Racer Mechanical or the Seiko Prospex Sea 1968 Heritage Diver's GMT?

At MSRP the Hemel Sky Racer Mechanical is the cheaper of the two at $550, against $1,500 for the Seiko Prospex Sea 1968 Heritage Diver's GMT — a $950 gap before any retailer discounting.

Which is bigger, the Hemel Sky Racer Mechanical or the Seiko Prospex Sea 1968 Heritage Diver's GMT?

The Hemel Sky Racer Mechanical wears larger at 43mm versus 42mm for the Seiko Prospex Sea 1968 Heritage Diver's GMT — a 1mm difference across the dial.

Which has better water resistance, the Hemel Sky Racer Mechanical or the Seiko Prospex Sea 1968 Heritage Diver's GMT?

The Seiko Prospex Sea 1968 Heritage Diver's GMT is rated to 200m versus 50m for the Hemel Sky Racer Mechanical.

Which has a longer power reserve, the Hemel Sky Racer Mechanical or the Seiko Prospex Sea 1968 Heritage Diver's GMT?

The Seiko Prospex Sea 1968 Heritage Diver's GMT carries a 72-hour power reserve against 40 hours on the Hemel Sky Racer Mechanical.

What movement does the Hemel Sky Racer Mechanical run compared to the Seiko Prospex Sea 1968 Heritage Diver's GMT?

The Hemel Sky Racer Mechanical runs a manual caliber (Seagull ST19), while the Seiko Prospex Sea 1968 Heritage Diver's GMT runs a automatic (6R54).

Side by side

Hemel Sky Racer MechanicalvsSeiko Prospex Sea 1968 Heritage Diver's GMT

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

Hemel Sky Racer Mechanical

HF37MNB

MSRP $550

Seiko Prospex Sea 1968 Heritage Diver's GMT

spb381j1

MSRP $1,500

At a glance

14 of 29 specs differ

Diameter

Sky Racer Mechanical43mm

Prospex Sea 1968 Heritage Diver's GMT42mm

Power Reserve

Sky Racer Mechanical40h

Prospex Sea 1968 Heritage Diver's GMT72h

Water Resistance

Sky Racer Mechanical50m

Prospex Sea 1968 Heritage Diver's GMT200m

MSRP

Sky Racer Mechanical$550

Prospex Sea 1968 Heritage Diver's GMT$1,500

Full specifications

Case

6 specs

Crystal & Dial

3 specs

Crystal

Domed Sapphire

Sapphire

AR Coating

Inner

Anti-reflective coating on inner surface

Lume

None

LumiBrite on hands, index(es) and bezel

Movement

4 specs

Caliber

Seagull ST19

6R54

Type

Manual

Automatic

Power Reserve

40h

72h

Jewels

Pricing

1 specs

MSRP

$550

$1,500

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