Which is cheaper, the Boldr Polaris or the Seiko Prospex Sea?

At MSRP the Boldr Polaris is the cheaper of the two at $399, against $595 for the Seiko Prospex Sea — a $196 gap before any retailer discounting.

Which is bigger, the Boldr Polaris or the Seiko Prospex Sea?

The Seiko Prospex Sea wears larger at 41.7mm versus 38mm for the Boldr Polaris — a 3.7mm difference across the dial.

Which has a longer power reserve, the Boldr Polaris or the Seiko Prospex Sea?

The Seiko Prospex Sea carries a 41-hour power reserve against 40 hours on the Boldr Polaris.

What movement does the Boldr Polaris run compared to the Seiko Prospex Sea?

Both watches run automatic movements — the Boldr Polaris uses the Seiko NH38A and the Seiko Prospex Sea uses the 4R35.

Side by side

Boldr PolarisvsSeiko Prospex Sea

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

Boldr Polaris

polaris-blackout

MSRP $399

Seiko Prospex Sea

srpl11

MSRP $595

At a glance

13 of 29 specs differ

Diameter

Polaris38mm

Prospex Sea41.7mm

Power Reserve

Polaris40h

Prospex Sea41h

Water Resistance

Polaris200m

Prospex Sea200m

MSRP

Polaris$399

Prospex Sea$595

Full specifications

Case

5 specs

Crystal & Dial

4 specs

Crystal

Sapphire

Hardlex

AR Coating

Yes

Inner

Dial Color

Blackout

Black

Lume

Super-LumiNova

LumiBrite on hands, index(es) and bezel

Movement

3 specs

Caliber

Seiko NH38A

4R35

Power Reserve

40h

41h

Jewels

Pricing

1 specs

MSRP

$399

$595

Follow this matchup

Get a note when Boldr Polaris vs Seiko Prospex Sea 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.

Hemelmicro

Adjacent matchups

People also compared

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

Hemel HD24 AutomaticvsSeiko Prospex Sea Seiko Prospex SeavsZelos Eagle 2 Seiko Prospex SeavsZelos Swordfish Field 38 Geckota Ocean-Scout Dive WatchvsSeiko Prospex Sea Dryden PathfindervsBoldr Polaris Boldr PolarisvsZelos Blacktip 41

Edit this comparison Add another watch Explore more 37–43mm watches

Boldr PolarisvsSeiko Prospex Sea

At a glance

Full specifications

Follow this matchup

More watches worth a look

HD24 Automatic

Pathfinder

Eagle 2

Blacktip 41

Croft Pioneer

Ocean-Scout Dive Watch

Seaforth IV

Skindiver II Professional

People also compared