Which is cheaper, the Hemel Sky Racer Mechanical or the Seiko Prospex SPEEDTIMER Mechanical?

At MSRP the Hemel Sky Racer Mechanical is the cheaper of the two at $550, against $995 for the Seiko Prospex SPEEDTIMER Mechanical — a $445 gap before any retailer discounting.

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

The Hemel Sky Racer Mechanical wears larger at 43mm versus 39.5mm for the Seiko Prospex SPEEDTIMER Mechanical — a 3.5mm difference across the dial.

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

The Hemel Sky Racer Mechanical is rated to 50m versus 20m for the Seiko Prospex SPEEDTIMER Mechanical.

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

The Seiko Prospex SPEEDTIMER Mechanical 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 SPEEDTIMER Mechanical?

The Hemel Sky Racer Mechanical runs a manual caliber (Seagull ST19), while the Seiko Prospex SPEEDTIMER Mechanical runs a automatic (6R55).

Side by side

Hemel Sky Racer MechanicalvsSeiko Prospex SPEEDTIMER Mechanical

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 SPEEDTIMER Mechanical

spb513j1

MSRP $995

At a glance

14 of 29 specs differ

Diameter

Sky Racer Mechanical43mm

Prospex SPEEDTIMER Mechanical39.5mm

Power Reserve

Sky Racer Mechanical40h

Prospex SPEEDTIMER Mechanical72h

Water Resistance

Sky Racer Mechanical50m

Prospex SPEEDTIMER Mechanical200m

MSRP

Sky Racer Mechanical$550

Prospex SPEEDTIMER Mechanical$995

Full specifications

Case

5 specs

Diameter

43mm

39.5mm

Thickness

14mm

12mm

Lug-to-Lug

49mm

44.5mm

Material

316L Stainless Steel

Stainless Steel

Water Resistance

50m

200m

Crystal & Dial

4 specs

Crystal

Domed Sapphire

Sapphire

Crystal Shape

Flat

Curved

AR Coating

Inner

Anti-reflective coating on inner surface

Lume

None

LumiBrite on hands and index(es)

Movement

4 specs

Caliber

Seagull ST19

6R55

Type

Manual

Automatic

Power Reserve

40h

72h

Jewels

Pricing

1 specs

MSRP

$550

$995

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