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

At MSRP the Hemel Sky Racer Mechanical is the cheaper of the two at $550, against $900 for the Seiko Prospex Sea — a $350 gap before any retailer discounting.

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

The Hemel Sky Racer Mechanical wears larger at 43mm versus 41mm for the Seiko Prospex Sea — a 2mm difference across the dial.

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

The Seiko Prospex Sea 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?

The Seiko Prospex Sea carries a 70-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?

The Hemel Sky Racer Mechanical runs a manual caliber (Seagull ST19), while the Seiko Prospex Sea runs a automatic (6R35).

Side by side

Hemel Sky Racer MechanicalvsSeiko Prospex Sea

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

spb317j1

MSRP $900

At a glance

15 of 29 specs differ

Diameter

Sky Racer Mechanical43mm

Prospex Sea41mm

Power Reserve

Sky Racer Mechanical40h

Prospex Sea70h

Water Resistance

Sky Racer Mechanical50m

Prospex Sea200m

MSRP

Sky Racer Mechanical$550

Prospex Sea$900

Full specifications

Case

6 specs

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, index(es) and bezel

Movement

4 specs

Caliber

Seagull ST19

6R35

Type

Manual

Automatic

Power Reserve

40h

70h

Jewels

Pricing

1 specs

MSRP

$550

$900

Follow this matchup

Get a note when Hemel Sky Racer Mechanical vs Seiko Prospex Sea gets more votes, a community discussion, or a price drop. No account needed.

Keep exploring

More watches worth a look

Matched to the watches above on size, movement, style and price — microbrands first. Open any one to dig in.

Hemelmicro

Air Support

Adjacent matchups

People also compared

Comparisons nearby in the catalog — alternatives to the watches above paired against the matchup.

Hemel HFC Mechanical ChronographvsSeiko Prospex Sea Lum-Tec EclipsevsSeiko Prospex Sea Seiko Prospex SeavsSpinnaker Hull Riviera Seiko Prospex SeavsYema Flygraf Navigator Dryden PathfindervsHemel Sky Racer Mechanical Hemel Sky Racer MechanicalvsWolbrook Skindiver II Professional

Edit this comparison Add another watch Explore more 40–44mm watches

Hemel Sky Racer MechanicalvsSeiko Prospex Sea

At a glance

Full specifications

Follow this matchup

More watches worth a look

HFC Mechanical Chronograph

Pathfinder

Eclipse

Skindiver II Professional

Hull Riviera

Spearfish 3

Flygraf Navigator

Swordfish 3

People also compared