Which is cheaper, the Aquastar Deepstar III or the Seiko Prospex Sea 1965 Heritage Diver's Watch?

At MSRP the Seiko Prospex Sea 1965 Heritage Diver's Watch is the cheaper of the two at $1,300, against $2,790 for the Aquastar Deepstar III — a $1,490 gap before any retailer discounting.

Which is bigger, the Aquastar Deepstar III or the Seiko Prospex Sea 1965 Heritage Diver's Watch?

The Seiko Prospex Sea 1965 Heritage Diver's Watch wears larger at 40mm versus 39mm for the Aquastar Deepstar III — a 1mm difference across the dial.

Which has better water resistance, the Aquastar Deepstar III or the Seiko Prospex Sea 1965 Heritage Diver's Watch?

The Seiko Prospex Sea 1965 Heritage Diver's Watch is rated to 300m versus 200m for the Aquastar Deepstar III.

Which has a longer power reserve, the Aquastar Deepstar III or the Seiko Prospex Sea 1965 Heritage Diver's Watch?

The Seiko Prospex Sea 1965 Heritage Diver's Watch carries a 72-hour power reserve against 55 hours on the Aquastar Deepstar III.

What movement does the Aquastar Deepstar III run compared to the Seiko Prospex Sea 1965 Heritage Diver's Watch?

The Aquastar Deepstar III runs a manual caliber, while the Seiko Prospex Sea 1965 Heritage Diver's Watch runs a automatic (6R55).

Side by side

Aquastar Deepstar IIIvsSeiko Prospex Sea 1965 Heritage Diver's Watch

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

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Aquastar Deepstar III

MSRP $2,790

See the full Deepstar III

Seiko Prospex Sea 1965 Heritage Diver's Watch

MSRP $1,300

See the full Prospex Sea 1965 Heritage Diver's Watch

At a glance

15 of 29 specs differ

Diameter

Deepstar III39mm

Prospex Sea 1965 Heritage Diver's Watch40mm

Power Reserve

Deepstar III55h

Prospex Sea 1965 Heritage Diver's Watch72h

Water Resistance

Deepstar III200m

Prospex Sea 1965 Heritage Diver's Watch300m

MSRP

Deepstar III$2,790

Prospex Sea 1965 Heritage Diver's Watch$1,300

Full specifications

Case

6 specs

Crystal & Dial

4 specs

Crystal Shape

—

Curved

AR Coating

—

Anti-reflective coating on inner surface

Dial Color

—

Lume

None

LumiBrite on hands, index(es) and bezel

Movement

4 specs

Caliber

—

6R55

Type

Manual

Automatic

Power Reserve

55h

72h

Jewels

Pricing

1 specs

MSRP

$2,790

$1,300

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Aquastar Deepstar IIIvsSeiko Prospex Sea 1965 Heritage Diver's Watch

At a glance

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