Which is cheaper, the Lum-Tec Combat B72 or the Seiko Prospex Sea?

At MSRP the Lum-Tec Combat B72 is the cheaper of the two at $595, against $625 for the Seiko Prospex Sea — a $30 gap before any retailer discounting.

Which is bigger, the Lum-Tec Combat B72 or the Seiko Prospex Sea?

The Seiko Prospex Sea wears larger at 43.8mm versus 43mm for the Lum-Tec Combat B72 — a 0.8mm difference across the dial.

Which has a longer power reserve, the Lum-Tec Combat B72 or the Seiko Prospex Sea?

The Seiko Prospex Sea carries a 41-hour power reserve against 40 hours on the Lum-Tec Combat B72.

What movement does the Lum-Tec Combat B72 run compared to the Seiko Prospex Sea?

Both watches run automatic movements — the Lum-Tec Combat B72 uses the Ronda 515 and the Seiko Prospex Sea uses the Seiko 4R35.

Side by side

Lum-Tec Combat B72vsSeiko Prospex Sea

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

Add a watch

Lum-Tec Combat B72

combat-b72

MSRP $595

See the full Combat B72

Seiko Prospex Sea

srpe37

MSRP $625

See the full Prospex Sea

At a glance

11 of 29 specs differ

Diameter

Combat B7243mm

Prospex Sea43.8mm

Power Reserve

Combat B7240h

Prospex Sea41h

Water Resistance

Combat B72200m

Prospex Sea200m

MSRP

Combat B72$595

Prospex Sea$625

Full specifications

Case

4 specs

Crystal & Dial

3 specs

AR Coating

Inner

Anti-reflective coating on inner surface

Dial Color

—

Black

Lume

None

LumiBrite on hands, index(es) and bezel

Movement

3 specs

Caliber

Ronda 515

Seiko 4R35

Power Reserve

40h

41h

Jewels

Pricing

1 specs

MSRP

$595

$625

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.

Geckotamicro

Follow this matchup

Get a note when Lum-Tec Combat B72 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.

Lum-Tec Combat B73vsSeiko Prospex Sea Lum-Tec Combat B71vsSeiko Prospex Sea Geckota PhalanxvsSeiko Prospex Sea Noctua Watch Corp. PDFL-1vsSeiko Prospex Sea Lum-Tec Combat B72vsSpinnaker Hass Automatic Boldr Odyssey OriginalvsLum-Tec Combat B72

Edit this comparison Add another watch Explore more 42–45mm watches

Lum-Tec Combat B72vsSeiko Prospex Sea

At a glance

Full specifications

More watches worth a look

Phalanx

Jamanta

Vanguard Steel

Wreck Automatic

Tesei Forged Carbon

Great White 43

Hammerhead 43 Field

Caloura 300m

Follow this matchup

People also compared