Side by side

Seiko Prospex Marinemaster Marinemaster 1968 Heritage JAMSTEC Limited EditionvsHemel Sky Racer Mechanical

Q: Which is cheaper, the Seiko Prospex Marinemaster Marinemaster 1968 Heritage JAMSTEC Limited Edition or the Hemel Sky Racer Mechanical?

At MSRP the Hemel Sky Racer Mechanical is the cheaper of the two at $550, against $3,900 for the Seiko Prospex Marinemaster Marinemaster 1968 Heritage JAMSTEC Limited Edition — a $3,350 gap before any retailer discounting.

Q: Which is bigger, the Seiko Prospex Marinemaster Marinemaster 1968 Heritage JAMSTEC Limited Edition or the Hemel Sky Racer Mechanical?

The Hemel Sky Racer Mechanical wears larger at 43mm versus 42.6mm for the Seiko Prospex Marinemaster Marinemaster 1968 Heritage JAMSTEC Limited Edition — a 0.4mm difference across the dial.

Q: Which has better water resistance, the Seiko Prospex Marinemaster Marinemaster 1968 Heritage JAMSTEC Limited Edition or the Hemel Sky Racer Mechanical?

The Seiko Prospex Marinemaster Marinemaster 1968 Heritage JAMSTEC Limited Edition is rated to 300m versus 50m for the Hemel Sky Racer Mechanical.

Q: Which has a longer power reserve, the Seiko Prospex Marinemaster Marinemaster 1968 Heritage JAMSTEC Limited Edition or the Hemel Sky Racer Mechanical?

The Seiko Prospex Marinemaster Marinemaster 1968 Heritage JAMSTEC Limited Edition carries a 72-hour power reserve against 40 hours on the Hemel Sky Racer Mechanical.

Q: What movement does the Seiko Prospex Marinemaster Marinemaster 1968 Heritage JAMSTEC Limited Edition run compared to the Hemel Sky Racer Mechanical?

The Seiko Prospex Marinemaster Marinemaster 1968 Heritage JAMSTEC Limited Edition runs a automatic caliber (8L45), while the Hemel Sky Racer Mechanical runs a manual (Seagull ST19).

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

Seiko Prospex Marinemaster Marinemaster 1968 Heritage JAMSTEC Limited Edition

hbf002j1

MSRP $3,900

Hemel Sky Racer Mechanical

HF37MNB

MSRP $550

At a glance

15 of 29 specs differ

Diameter

Prospex Marinemaster Marinemaster 1968 Heritage JAMSTEC Limited Edition42.6mm

Sky Racer Mechanical43mm

Power Reserve

Prospex Marinemaster Marinemaster 1968 Heritage JAMSTEC Limited Edition72h

Sky Racer Mechanical40h

Water Resistance

Prospex Marinemaster Marinemaster 1968 Heritage JAMSTEC Limited Edition300m

Sky Racer Mechanical50m

MSRP

Prospex Marinemaster Marinemaster 1968 Heritage JAMSTEC Limited Edition$3,900

Sky Racer Mechanical$550

Full specifications

Case

6 specs

Crystal & Dial

4 specs

Crystal

Sapphire

Domed Sapphire

Crystal Shape

Curved

Flat

AR Coating

Anti-reflective coating on inner surface

Inner

Lume

LumiBrite on hands, index(es) and bezel

None

Movement

4 specs

Caliber

8L45

Seagull ST19

Type

Automatic

Manual

Power Reserve

72h

40h

Jewels

Pricing

1 specs

MSRP

$3,900

$550

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