Which is cheaper, the Geckota Phalanx or the Seiko Prospex Sea The Black Series?

At MSRP the Geckota Phalanx is the cheaper of the two at $349, against $765 for the Seiko Prospex Sea The Black Series — a $416 gap before any retailer discounting.

Which is bigger, the Geckota Phalanx or the Seiko Prospex Sea The Black Series?

The Seiko Prospex Sea The Black Series wears larger at 45mm versus 42mm for the Geckota Phalanx — a 3mm difference across the dial.

Which has better water resistance, the Geckota Phalanx or the Seiko Prospex Sea The Black Series?

The Geckota Phalanx is rated to 300m versus 200m for the Seiko Prospex Sea The Black Series.

Which has a longer power reserve, the Geckota Phalanx or the Seiko Prospex Sea The Black Series?

The Seiko Prospex Sea The Black Series carries a 41-hour power reserve against 40 hours on the Geckota Phalanx.

What movement does the Geckota Phalanx run compared to the Seiko Prospex Sea The Black Series?

Both watches run automatic movements — the Geckota Phalanx uses the ETA 2824 and the Seiko Prospex Sea The Black Series uses the 4R36.

Side by side

Geckota PhalanxvsSeiko Prospex Sea The Black Series

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

Geckota Phalanx

phalanx-satin-reef-green

MSRP $349

Seiko Prospex Sea The Black Series

srpk43

MSRP $765

At a glance

13 of 29 specs differ

Diameter

Phalanx42mm

Prospex Sea The Black Series45mm

Power Reserve

Phalanx40h

Prospex Sea The Black Series41h

Water Resistance

Phalanx300m

Prospex Sea The Black Series200m

MSRP

Phalanx$349

Prospex Sea The Black Series$765

Full specifications

Case

6 specs

Diameter

42mm

45mm

Thickness

13.9mm

13.2mm

Lug-to-Lug

—

47.7mm

Lug Width

—

22mm

Material

316L Stainless Steel

Stainless Steel

Water Resistance

300m

200m

Crystal & Dial

3 specs

AR Coating

Inner

Anti-reflective coating on inner surface

Dial Color

Green

Black

Lume

None

LumiBrite on hands, index(es) and bezel

Movement

3 specs

Caliber

ETA 2824

4R36

Power Reserve

40h

41h

Jewels

Pricing

1 specs

MSRP

$349

$765

Follow this matchup

Get a note when Geckota Phalanx vs Seiko Prospex Sea The Black Series gets more votes, a community discussion, or a price drop. No account needed.

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.

Dan Henrymicro

Adjacent matchups

People also compared

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

Dan Henry 1970vsSeiko Prospex Sea The Black Series Geckota Sea-Hunter Dive WatchvsSeiko Prospex Sea The Black Series Henry Archer NordsøvsSeiko Prospex Sea The Black Series Seiko Prospex Sea The Black SeriesvsWolbrook Skindiver Automatic Geckota PhalanxvsSpinnaker Wreck Automatic Marathon OSAR-D (Original SAR with Date) Automatic 46mmvsGeckota Phalanx

Edit this comparison Add another watch More diver comparisons Best Diver Watches Under $500 Explore more 41–46mm watches

Geckota PhalanxvsSeiko Prospex Sea The Black Series

At a glance

Full specifications

Follow this matchup

More watches worth a look

1970

Wreck Automatic

Sea-Hunter Dive Watch

OSAR-D (Original SAR with Date) Automatic 46mm

Nordsø

Dumas Automatic

Skindiver Automatic

Superman Tourbillon CMM.31 Limited Edition

People also compared