Which is cheaper, the Seiko Prospex Sea 1968 Heritage Diver's GMT or the Unimatic Modello Uno UC1 Classic Diver?

At MSRP the Unimatic Modello Uno UC1 Classic Diver is the cheaper of the two at $760, against $1,500 for the Seiko Prospex Sea 1968 Heritage Diver's GMT — a $740 gap before any retailer discounting.

Which is bigger, the Seiko Prospex Sea 1968 Heritage Diver's GMT or the Unimatic Modello Uno UC1 Classic Diver?

The Seiko Prospex Sea 1968 Heritage Diver's GMT wears larger at 42mm versus 41.5mm for the Unimatic Modello Uno UC1 Classic Diver — a 0.5mm difference across the dial.

Which has better water resistance, the Seiko Prospex Sea 1968 Heritage Diver's GMT or the Unimatic Modello Uno UC1 Classic Diver?

The Unimatic Modello Uno UC1 Classic Diver is rated to 300m versus 200m for the Seiko Prospex Sea 1968 Heritage Diver's GMT.

What movement does the Seiko Prospex Sea 1968 Heritage Diver's GMT run compared to the Unimatic Modello Uno UC1 Classic Diver?

Both watches run automatic movements — the Seiko Prospex Sea 1968 Heritage Diver's GMT uses the Seiko 6R54 and the Unimatic Modello Uno UC1 Classic Diver uses the Seiko NH35.

Side by side

Seiko Prospex Sea 1968 Heritage Diver's GMTvsUnimatic Modello Uno UC1 Classic Diver

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

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Seiko Prospex Sea 1968 Heritage Diver's GMT

MSRP $1,500

See the full Prospex Sea 1968 Heritage Diver's GMT

Unimatic Modello Uno UC1 Classic Diver

uc1

MSRP $760

See the full Modello Uno UC1 Classic Diver

At a glance

15 of 29 specs differ

Diameter

Prospex Sea 1968 Heritage Diver's GMT42mm

Modello Uno UC1 Classic Diver41.5mm

Power Reserve

Prospex Sea 1968 Heritage Diver's GMT72h

Modello Uno UC1 Classic Diver—

Water Resistance

Prospex Sea 1968 Heritage Diver's GMT200m

Modello Uno UC1 Classic Diver300m

MSRP

Prospex Sea 1968 Heritage Diver's GMT$1,500

Modello Uno UC1 Classic Diver$760

Full specifications

Case

7 specs

Crystal & Dial

4 specs

Crystal

Sapphire

—

AR Coating

Anti-reflective coating on inner surface

—

Dial Color

—

Matte black

Lume

LumiBrite on hands, index(es) and bezel

None

Movement

3 specs

Caliber

Seiko 6R54

Seiko NH35

Power Reserve

72h

Jewels

Pricing

1 specs

MSRP

$1,500

$760

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Seiko Prospex Sea 1968 Heritage Diver's GMTvsUnimatic Modello Uno UC1 Classic Diver

At a glance

Full specifications

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