Which is cheaper, the Aquastar Deepstar Chronograph or the Seiko Prospex Sea?

At MSRP the Seiko Prospex Sea is the cheaper of the two at $1,100, against $2,790 for the Aquastar Deepstar Chronograph — a $1,690 gap before any retailer discounting.

Which is bigger, the Aquastar Deepstar Chronograph or the Seiko Prospex Sea?

The Seiko Prospex Sea wears larger at 41.3mm versus 39mm for the Aquastar Deepstar Chronograph — a 2.3mm difference across the dial.

Which has better water resistance, the Aquastar Deepstar Chronograph or the Seiko Prospex Sea?

The Seiko Prospex Sea is rated to 300m versus 200m for the Aquastar Deepstar Chronograph.

Which has a longer power reserve, the Aquastar Deepstar Chronograph or the Seiko Prospex Sea?

The Seiko Prospex Sea carries a 72-hour power reserve against 55 hours on the Aquastar Deepstar Chronograph.

Side by side

Aquastar Deepstar ChronographvsSeiko Prospex Sea

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

Add a watch

Aquastar Deepstar Chronograph

MSRP $2,790

See the full Deepstar Chronograph

Seiko Prospex Sea

MSRP $1,100

See the full Prospex Sea

At a glance

13 of 29 specs differ

Diameter

Deepstar Chronograph39mm

Prospex Sea41.3mm

Power Reserve

Deepstar Chronograph55h

Prospex Sea72h

Water Resistance

Deepstar Chronograph200m

Prospex Sea300m

MSRP

Deepstar Chronograph$2,790

Prospex Sea$1,100

Full specifications

Case

6 specs

Crystal & Dial

3 specs

AR Coating

—

Anti-reflective coating on inner surface

Dial Color

Silver

—

Lume

None

LumiBrite on hands, index(es) and bezel

Movement

3 specs

Caliber

—

Seiko 6R55

Power Reserve

55h

72h

Jewels

Pricing

1 specs

MSRP

$2,790

$1,100

Keep exploring

More watches worth a look

Matched to the watches above on size, movement, style and price — microbrands first. Open any one to dig in.

Olech & Wajs Watchesmicro

Follow this matchup

Get a note when Aquastar Deepstar Chronograph vs Seiko Prospex Sea gets more votes, a community discussion, or a price drop. No account needed.

Adjacent matchups

People also compared

Comparisons nearby in the catalog — alternatives to the watches above paired against the matchup.

Orologi Calamai G50 CRONOvsSeiko Prospex Sea Aquastar Deepstar IIvsSeiko Prospex Sea Seiko Prospex SeavsZelos Vitesse Lorca MODEL No.2 CHRONOGRAPHvsSeiko Prospex Sea Aquastar Deepstar ChronographvsDryden Pathfinder Aquastar Deepstar ChronographvsBorealis Watch Co. Caloura 300m

Edit this comparison Add another watch Explore more 38–43mm watches

Aquastar Deepstar ChronographvsSeiko Prospex Sea

At a glance

Full specifications

More watches worth a look

COUPE DES ALPES

Pathfinder

RALLYE DE PARIS

Estoril 300 GMT

RN81 Clearance Diver Automatic Watch

G50 Freccia Blu Soleil

Odyssey 40mm

Airstar Chronograph

Follow this matchup

People also compared