Which is cheaper, the Seiko Prospex Sea or the Squale 1521?

At MSRP the Seiko Prospex Sea is the cheaper of the two at $900, against $1,265 for the Squale 1521 — a $365 gap before any retailer discounting.

Which is bigger, the Seiko Prospex Sea or the Squale 1521?

The Squale 1521 wears larger at 42mm versus 41mm for the Seiko Prospex Sea — a 1mm difference across the dial.

Which has better water resistance, the Seiko Prospex Sea or the Squale 1521?

The Squale 1521 is rated to 500m versus 200m for the Seiko Prospex Sea.

Which has a longer power reserve, the Seiko Prospex Sea or the Squale 1521?

The Seiko Prospex Sea carries a 70-hour power reserve against 38 hours on the Squale 1521.

What movement does the Seiko Prospex Sea run compared to the Squale 1521?

Both watches run automatic movements — the Seiko Prospex Sea uses the Seiko 6R35 and the Squale 1521 uses the Sellita SW200-1.

Side by side

Seiko Prospex SeavsSquale 1521

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

Add a watch

Seiko Prospex Sea

MSRP $900

See the full Prospex Sea

Squale 1521

1521-classic-leather

MSRP $1,265

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At a glance

13 of 29 specs differ

Diameter

Prospex Sea41mm

152142mm

Power Reserve

Prospex Sea70h

152138h

Water Resistance

Prospex Sea200m

1521500m

MSRP

Prospex Sea$900

1521$1,265

Full specifications

Case

6 specs

Crystal & Dial

3 specs

Crystal Shape

Curved

—

AR Coating

Anti-reflective coating on inner surface

—

Lume

LumiBrite on hands, index(es) and bezel

None

Movement

3 specs

Caliber

Seiko 6R35

Sellita SW200-1

Power Reserve

70h

38h

Jewels

Pricing

1 specs

MSRP

$900

$1,265

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