Which is cheaper, the Seiko Prospex Sea or the Trematic T-Five Beigua Maris?

At MSRP the Seiko Prospex Sea is the cheaper of the two at $900, against $1,020 for the Trematic T-Five Beigua Maris — a $120 gap before any retailer discounting.

Which is bigger, the Seiko Prospex Sea or the Trematic T-Five Beigua Maris?

The Seiko Prospex Sea wears larger at 41mm versus 40mm for the Trematic T-Five Beigua Maris — a 1mm difference across the dial.

Which has better water resistance, the Seiko Prospex Sea or the Trematic T-Five Beigua Maris?

The Trematic T-Five Beigua Maris is rated to 300m versus 200m for the Seiko Prospex Sea.

What movement does the Seiko Prospex Sea run compared to the Trematic T-Five Beigua Maris?

Both watches run automatic movements — the Seiko Prospex Sea uses the Seiko 6R35 and the Trematic T-Five Beigua Maris uses the La Joux-Perret G101.

Side by side

Seiko Prospex SeavsTrematic T-Five Beigua Maris

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

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Seiko Prospex Sea

MSRP $900

See the full Prospex Sea

Trematic T-Five Beigua Maris

t-five-beigua-maris

MSRP $1,020

See the full T-Five Beigua Maris

At a glance

14 of 29 specs differ

Diameter

Prospex Sea41mm

T-Five Beigua Maris40mm

Power Reserve

Prospex Sea70h

T-Five Beigua Maris—

Water Resistance

Prospex Sea200m

T-Five Beigua Maris300m

MSRP

Prospex Sea$900

T-Five Beigua Maris$1,020

Full specifications

Case

6 specs

Crystal & Dial

4 specs

Crystal Shape

Curved

—

AR Coating

Anti-reflective coating on inner surface

—

Dial Color

—

Lume

LumiBrite on hands, index(es) and bezel

None

Movement

3 specs

Caliber

Seiko 6R35

La Joux-Perret G101

Power Reserve

70h

Jewels

Pricing

1 specs

MSRP

$900

$1,020

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Seiko Prospex SeavsTrematic T-Five Beigua Maris

At a glance

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