Which is cheaper, the Hemel HD24 Automatic or the Seiko Prospex Sea 1970 Heritage Diver's Black Series Limited Edition?

At MSRP the Hemel HD24 Automatic is the cheaper of the two at $300, against $3,300 for the Seiko Prospex Sea 1970 Heritage Diver's Black Series Limited Edition — a $3,000 gap before any retailer discounting.

Which is bigger, the Hemel HD24 Automatic or the Seiko Prospex Sea 1970 Heritage Diver's Black Series Limited Edition?

The Seiko Prospex Sea 1970 Heritage Diver's Black Series Limited Edition wears larger at 44mm versus 40mm for the Hemel HD24 Automatic — a 4mm difference across the dial.

Which has a longer power reserve, the Hemel HD24 Automatic or the Seiko Prospex Sea 1970 Heritage Diver's Black Series Limited Edition?

The Seiko Prospex Sea 1970 Heritage Diver's Black Series Limited Edition carries a 50-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 1970 Heritage Diver's Black Series Limited Edition?

Both watches run automatic movements — the Hemel HD24 Automatic uses the Seiko NH38A and the Seiko Prospex Sea 1970 Heritage Diver's Black Series Limited Edition uses the 8L35.

Side by side

Hemel HD24 AutomaticvsSeiko Prospex Sea 1970 Heritage Diver's Black Series Limited Edition

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 1970 Heritage Diver's Black Series Limited Edition

sla061j1

MSRP $3,300

At a glance

12 of 29 specs differ

Diameter

HD24 Automatic40mm

Prospex Sea 1970 Heritage Diver's Black Series Limited Edition44mm

Power Reserve

HD24 Automatic40h

Prospex Sea 1970 Heritage Diver's Black Series Limited Edition50h

Water Resistance

HD24 Automatic200m

Prospex Sea 1970 Heritage Diver's Black Series Limited Edition200m

MSRP

HD24 Automatic$300

Prospex Sea 1970 Heritage Diver's Black Series Limited Edition$3,300

Full specifications

Case

3 specs

Diameter

40mm

44mm

Lug-to-Lug

48mm

49.3mm

Material

316L Stainless Steel

Stainless Steel

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, index(es) and bezel

Movement

3 specs

Caliber

Seiko NH38A

8L35

Power Reserve

40h

50h

Jewels

Pricing

1 specs

MSRP

$300

$3,300

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