Which is cheaper, the Seiko Prospex Sea PADI Special Edition or the Undone AquaLume Automatic?

At MSRP the Undone AquaLume Automatic is the cheaper of the two at $395, against $625 for the Seiko Prospex Sea PADI Special Edition — a $230 gap before any retailer discounting.

Which is bigger, the Seiko Prospex Sea PADI Special Edition or the Undone AquaLume Automatic?

The Seiko Prospex Sea PADI Special Edition wears larger at 43.8mm versus 43mm for the Undone AquaLume Automatic — a 0.8mm difference across the dial.

Which has better water resistance, the Seiko Prospex Sea PADI Special Edition or the Undone AquaLume Automatic?

The Undone AquaLume Automatic is rated to 500m versus 200m for the Seiko Prospex Sea PADI Special Edition.

What movement does the Seiko Prospex Sea PADI Special Edition run compared to the Undone AquaLume Automatic?

Both watches run automatic movements — the Seiko Prospex Sea PADI Special Edition uses the Seiko 4R35 and the Undone AquaLume Automatic uses the Seiko NH35.

Side by side

Seiko Prospex Sea PADI Special EditionvsUndone AquaLume Automatic

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

Add a watch

Seiko Prospex Sea PADI Special Edition

MSRP $625

See the full Prospex Sea PADI Special Edition

Undone AquaLume Automatic

MSRP $395

See the full AquaLume Automatic

At a glance

15 of 29 specs differ

Diameter

Prospex Sea PADI Special Edition43.8mm

AquaLume Automatic43mm

Power Reserve

Prospex Sea PADI Special Edition41h

AquaLume Automatic—

Water Resistance

Prospex Sea PADI Special Edition200m

AquaLume Automatic500m

MSRP

Prospex Sea PADI Special Edition$625

AquaLume Automatic$395

Full specifications

Case

7 specs

Crystal & Dial

4 specs

Crystal

Sapphire

—

AR Coating

Anti-reflective coating on inner surface

—

Dial Color

—

Lume

LumiBrite on hands, index(es) and bezel

None

Movement

3 specs

Caliber

Seiko 4R35

Seiko NH35

Power Reserve

41h

—

Jewels

Pricing

1 specs

MSRP

$625

$395

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Seiko Prospex Sea PADI Special EditionvsUndone AquaLume Automatic

At a glance

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