Which is cheaper, the Core Timepieces The River Watch or the Seiko Prospex Sea The Black Series?

At MSRP the Core Timepieces The River Watch is the cheaper of the two at $540, against $765 for the Seiko Prospex Sea The Black Series — a $225 gap before any retailer discounting.

Which is bigger, the Core Timepieces The River Watch or the Seiko Prospex Sea The Black Series?

The Seiko Prospex Sea The Black Series wears larger at 45mm versus 42mm for the Core Timepieces The River Watch — a 3mm difference across the dial.

Which has better water resistance, the Core Timepieces The River Watch or the Seiko Prospex Sea The Black Series?

The Core Timepieces The River Watch is rated to 300m versus 200m for the Seiko Prospex Sea The Black Series.

What movement does the Core Timepieces The River Watch run compared to the Seiko Prospex Sea The Black Series?

Both watches run automatic movements — the Core Timepieces The River Watch uses the Seiko NH34A and the Seiko Prospex Sea The Black Series uses the 4R36.

Side by side

Core Timepieces The River WatchvsSeiko Prospex Sea The Black Series

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

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Core Timepieces The River Watch

MSRP $540

Seiko Prospex Sea The Black Series

srpk43

MSRP $765

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Buy from Seiko ↗

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At a glance

14 of 29 specs differ

Diameter

The River Watch42mm

Prospex Sea The Black Series45mm

Power Reserve

The River Watch—

Prospex Sea The Black Series41h

Water Resistance

The River Watch300m

Prospex Sea The Black Series200m

MSRP

The River Watch$540

Prospex Sea The Black Series$765

Full specifications

Case

7 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

Seiko NH34A

4R36

Power Reserve

—

41h

Jewels

Pricing

1 specs

MSRP

—

$765

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Core Timepieces The River WatchvsSeiko Prospex Sea The Black Series

At a glance

Full specifications

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