Which is cheaper, the Boldr Blastoise or the Seiko Prospex Land Mechanical?

At MSRP the Boldr Blastoise is the cheaper of the two at $449, against $995 for the Seiko Prospex Land Mechanical — a $546 gap before any retailer discounting.

Which is bigger, the Boldr Blastoise or the Seiko Prospex Land Mechanical?

The Boldr Blastoise wears larger at 40mm versus 39.5mm for the Seiko Prospex Land Mechanical — a 0.5mm difference across the dial.

Which has better water resistance, the Boldr Blastoise or the Seiko Prospex Land Mechanical?

The Boldr Blastoise is rated to 200m versus 20m for the Seiko Prospex Land Mechanical.

Which has a longer power reserve, the Boldr Blastoise or the Seiko Prospex Land Mechanical?

The Seiko Prospex Land Mechanical carries a 72-hour power reserve against 40 hours on the Boldr Blastoise.

What movement does the Boldr Blastoise run compared to the Seiko Prospex Land Mechanical?

Both watches run automatic movements — the Boldr Blastoise uses the Seiko (SII) NH37 and the Seiko Prospex Land Mechanical uses the 6R55.

Side by side

Boldr BlastoisevsSeiko Prospex Land Mechanical

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

Boldr Blastoise

blastoise

MSRP $449

Seiko Prospex Land Mechanical

spb503j1

MSRP $995

At a glance

11 of 29 specs differ

Diameter

Blastoise40mm

Prospex Land Mechanical39.5mm

Power Reserve

Blastoise40h

Prospex Land Mechanical72h

Water Resistance

Blastoise200m

Prospex Land Mechanical200m

MSRP

Blastoise$449

Prospex Land Mechanical$995

Full specifications

Case

4 specs

Crystal & Dial

3 specs

AR Coating

Inner

Anti-reflective coating on inner surface

Dial Color

Blastoise

Black

Lume

Super-LumiNova

LumiBrite on hands and index(es)

Movement

3 specs

Caliber

Seiko (SII) NH37

6R55

Power Reserve

40h

72h

Jewels

Pricing

1 specs

MSRP

$449

$995

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Boldr BlastoisevsSeiko Prospex Land Mechanical

At a glance

Full specifications

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