Which is cheaper, the Duckworth Prestex Belmont 300 Automatic or the Seiko Prospex Sea The Black Series?

At MSRP the Duckworth Prestex Belmont 300 Automatic is the cheaper of the two at $750, against $765 for the Seiko Prospex Sea The Black Series — a $15 gap before any retailer discounting.

Which is bigger, the Duckworth Prestex Belmont 300 Automatic or the Seiko Prospex Sea The Black Series?

The Seiko Prospex Sea The Black Series wears larger at 45mm versus 42mm for the Duckworth Prestex Belmont 300 Automatic — a 3mm difference across the dial.

Which has better water resistance, the Duckworth Prestex Belmont 300 Automatic or the Seiko Prospex Sea The Black Series?

The Duckworth Prestex Belmont 300 Automatic is rated to 300m versus 200m for the Seiko Prospex Sea The Black Series.

Which has a longer power reserve, the Duckworth Prestex Belmont 300 Automatic or the Seiko Prospex Sea The Black Series?

The Seiko Prospex Sea The Black Series carries a 41-hour power reserve against 38 hours on the Duckworth Prestex Belmont 300 Automatic.

What movement does the Duckworth Prestex Belmont 300 Automatic run compared to the Seiko Prospex Sea The Black Series?

Both watches run automatic movements — the Duckworth Prestex Belmont 300 Automatic uses the Miyota 9039 and the Seiko Prospex Sea The Black Series uses the 4R36.

Side by side

Duckworth Prestex Belmont 300 AutomaticvsSeiko Prospex Sea The Black Series

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

Add a watch

Duckworth Prestex Belmont 300 Automatic

belmont-300

MSRP $750

Seiko Prospex Sea The Black Series

srpk43

MSRP $765

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Buy from Seiko ↗

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At a glance

13 of 29 specs differ

Diameter

Belmont 300 Automatic42mm

Prospex Sea The Black Series45mm

Power Reserve

Belmont 300 Automatic38h

Prospex Sea The Black Series41h

Water Resistance

Belmont 300 Automatic300m

Prospex Sea The Black Series200m

MSRP

Belmont 300 Automatic$750

Prospex Sea The Black Series$765

Full specifications

Case

6 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

Miyota 9039

4R36

Power Reserve

38h

41h

Jewels

Pricing

1 specs

MSRP

$750

$765

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Duckworth Prestex Belmont 300 AutomaticvsSeiko Prospex Sea The Black Series

At a glance

Full specifications

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