Which is cheaper, the Hemel HD24 Automatic or the Seiko Prospex Sea 1968 Heritage Diver's GMT Watch?

At MSRP the Hemel HD24 Automatic is the cheaper of the two at $300, against $1,700 for the Seiko Prospex Sea 1968 Heritage Diver's GMT Watch — a $1,400 gap before any retailer discounting.

Which is bigger, the Hemel HD24 Automatic or the Seiko Prospex Sea 1968 Heritage Diver's GMT Watch?

The Seiko Prospex Sea 1968 Heritage Diver's GMT Watch 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 Sea 1968 Heritage Diver's GMT Watch?

The Seiko Prospex Sea 1968 Heritage Diver's GMT Watch is rated to 300m versus 200m for the Hemel HD24 Automatic.

Which has a longer power reserve, the Hemel HD24 Automatic or the Seiko Prospex Sea 1968 Heritage Diver's GMT Watch?

The Seiko Prospex Sea 1968 Heritage Diver's GMT Watch carries a 72-hour power reserve against 40 hours on the Hemel HD24 Automatic.

What movement does the Hemel HD24 Automatic run compared to the Seiko Prospex Sea 1968 Heritage Diver's GMT Watch?

Both watches run automatic movements — the Hemel HD24 Automatic uses the Seiko NH38A and the Seiko Prospex Sea 1968 Heritage Diver's GMT Watch uses the 6R54.

Side by side

Hemel HD24 AutomaticvsSeiko Prospex Sea 1968 Heritage Diver's GMT Watch

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 Sea 1968 Heritage Diver's GMT Watch

spb519j1

MSRP $1,700

At a glance

13 of 29 specs differ

Diameter

HD24 Automatic40mm

Prospex Sea 1968 Heritage Diver's GMT Watch42mm

Power Reserve

HD24 Automatic40h

Prospex Sea 1968 Heritage Diver's GMT Watch72h

Water Resistance

HD24 Automatic200m

Prospex Sea 1968 Heritage Diver's GMT Watch300m

MSRP

HD24 Automatic$300

Prospex Sea 1968 Heritage Diver's GMT Watch$1,700

Full specifications

Case

5 specs

Diameter

40mm

42mm

Thickness

13mm

13.3mm

Lug-to-Lug

48mm

48.6mm

Material

316L Stainless Steel

Stainless Steel

Water Resistance

200m

300m

Crystal & Dial

4 specs

Crystal

Domed Sapphire

Sapphire

AR Coating

Inner

Anti-reflective coating on inner surface

Dial Color

Gallant USAF Edition

Black

Lume

None

LumiBrite on hands, index(es) and bezel

Movement

3 specs

Caliber

Seiko NH38A

6R54

Power Reserve

40h

72h

Jewels

Pricing

1 specs

MSRP

$300

$1,700

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