Which is cheaper, the Noctua Watch Corp. Sentinel or the Seiko Prospex Land Mechanical?

At MSRP the Noctua Watch Corp. Sentinel is the cheaper of the two at $429, against $995 for the Seiko Prospex Land Mechanical — a $566 gap before any retailer discounting.

Which is bigger, the Noctua Watch Corp. Sentinel or the Seiko Prospex Land Mechanical?

The Noctua Watch Corp. Sentinel wears larger at 42mm versus 39.5mm for the Seiko Prospex Land Mechanical — a 2.5mm difference across the dial.

Which has better water resistance, the Noctua Watch Corp. Sentinel or the Seiko Prospex Land Mechanical?

The Noctua Watch Corp. Sentinel is rated to 300m versus 20m for the Seiko Prospex Land Mechanical.

What movement does the Noctua Watch Corp. Sentinel run compared to the Seiko Prospex Land Mechanical?

Both watches run automatic movements — the Noctua Watch Corp. Sentinel uses the Seiko NH35A and the Seiko Prospex Land Mechanical uses the 6R55.

Side by side

Noctua Watch Corp. SentinelvsSeiko Prospex Land Mechanical

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

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Noctua Watch Corp.Sentinel

noctua-watch-corp-sentinel-verdant

MSRP $429

Seiko Prospex Land Mechanical

spb503j1

MSRP $995

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At a glance

13 of 29 specs differ

Diameter

Sentinel42mm

Prospex Land Mechanical39.5mm

Power Reserve

Sentinel—

Prospex Land Mechanical72h

Water Resistance

Sentinel300m

Prospex Land Mechanical200m

MSRP

Sentinel$429

Prospex Land Mechanical$995

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 and index(es)

Movement

3 specs

Caliber

Seiko NH35A

6R55

Power Reserve

—

72h

Jewels

Pricing

1 specs

MSRP

—

$995

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Noctua Watch Corp. SentinelvsSeiko Prospex Land Mechanical

At a glance

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