Which is cheaper, the Hemel HD24 Automatic or the Seiko Prospex SPEEDTIMER Mechanical Chronograph?

At MSRP the Hemel HD24 Automatic is the cheaper of the two at $300, against $2,500 for the Seiko Prospex SPEEDTIMER Mechanical Chronograph — a $2,200 gap before any retailer discounting.

Which is bigger, the Hemel HD24 Automatic or the Seiko Prospex SPEEDTIMER Mechanical Chronograph?

The Seiko Prospex SPEEDTIMER Mechanical Chronograph wears larger at 42mm versus 40mm for the Hemel HD24 Automatic — a 2mm difference across the dial.

Which has better water resistance, the Hemel HD24 Automatic or the Seiko Prospex SPEEDTIMER Mechanical Chronograph?

The Hemel HD24 Automatic is rated to 200m versus 10m for the Seiko Prospex SPEEDTIMER Mechanical Chronograph.

Which has a longer power reserve, the Hemel HD24 Automatic or the Seiko Prospex SPEEDTIMER Mechanical Chronograph?

The Seiko Prospex SPEEDTIMER Mechanical Chronograph carries a 45-hour power reserve against 40 hours on the Hemel HD24 Automatic.

What movement does the Hemel HD24 Automatic run compared to the Seiko Prospex SPEEDTIMER Mechanical Chronograph?

Both watches run automatic movements — the Hemel HD24 Automatic uses the Seiko NH38A and the Seiko Prospex SPEEDTIMER Mechanical Chronograph uses the 8R48.

Side by side

Hemel HD24 AutomaticvsSeiko Prospex SPEEDTIMER Mechanical Chronograph

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

Hemel HD24 Automatic

the-gallant

MSRP $300

Seiko Prospex SPEEDTIMER Mechanical Chronograph

srq047j1

MSRP $2,500

At a glance

15 of 29 specs differ

Diameter

HD24 Automatic40mm

Prospex SPEEDTIMER Mechanical Chronograph42mm

Power Reserve

HD24 Automatic40h

Prospex SPEEDTIMER Mechanical Chronograph45h

Water Resistance

HD24 Automatic200m

Prospex SPEEDTIMER Mechanical Chronograph100m

MSRP

HD24 Automatic$300

Prospex SPEEDTIMER Mechanical Chronograph$2,500

Full specifications

Case

6 specs

Crystal & Dial

5 specs

Crystal

Domed Sapphire

Sapphire

Crystal Shape

Flat

Curved

AR Coating

Inner

Anti-reflective coating on inner surface

Dial Color

Gallant USAF Edition

Black

Lume

None

LumiBrite on hands and index(es)

Movement

3 specs

Caliber

Seiko NH38A

8R48

Power Reserve

40h

45h

Jewels

Pricing

1 specs

MSRP

$300

$2,500

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