Which is cheaper, the Hemel HD24 Automatic or the Seiko Prospex Sea 1970 Heritage Diver's Save the Ocean Special Edition?

At MSRP the Hemel HD24 Automatic is the cheaper of the two at $300, against $1,350 for the Seiko Prospex Sea 1970 Heritage Diver's Save the Ocean Special Edition — a $1,050 gap before any retailer discounting.

Which is bigger, the Hemel HD24 Automatic or the Seiko Prospex Sea 1970 Heritage Diver's Save the Ocean Special Edition?

The Seiko Prospex Sea 1970 Heritage Diver's Save the Ocean Special Edition wears larger at 42.7mm versus 40mm for the Hemel HD24 Automatic — a 2.7mm difference across the dial.

Which has a longer power reserve, the Hemel HD24 Automatic or the Seiko Prospex Sea 1970 Heritage Diver's Save the Ocean Special Edition?

The Seiko Prospex Sea 1970 Heritage Diver's Save the Ocean Special Edition carries a 70-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 Save the Ocean Special Edition?

Both watches run automatic movements — the Hemel HD24 Automatic uses the Seiko NH38A and the Seiko Prospex Sea 1970 Heritage Diver's Save the Ocean Special Edition uses the 6R35.

Side by side

Hemel HD24 AutomaticvsSeiko Prospex Sea 1970 Heritage Diver's Save the Ocean Special 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 Save the Ocean Special Edition

spb301j1

MSRP $1,350

At a glance

13 of 29 specs differ

Diameter

HD24 Automatic40mm

Prospex Sea 1970 Heritage Diver's Save the Ocean Special Edition42.7mm

Power Reserve

HD24 Automatic40h

Prospex Sea 1970 Heritage Diver's Save the Ocean Special Edition70h

Water Resistance

HD24 Automatic200m

Prospex Sea 1970 Heritage Diver's Save the Ocean Special Edition200m

MSRP

HD24 Automatic$300

Prospex Sea 1970 Heritage Diver's Save the Ocean Special Edition$1,350

Full specifications

Case

4 specs

Diameter

40mm

42.7mm

Thickness

13mm

13.2mm

Lug-to-Lug

48mm

46.4mm

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

6R35

Power Reserve

40h

70h

Jewels

Pricing

1 specs

MSRP

$300

$1,350

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