Which is cheaper, the AVI-8 Bell X-1 Machbuster Automatic or the Seiko Prospex Land Mechanical GMT?

At MSRP the AVI-8 Bell X-1 Machbuster Automatic is the cheaper of the two at $350, against $1,150 for the Seiko Prospex Land Mechanical GMT — a $800 gap before any retailer discounting.

Which has better water resistance, the AVI-8 Bell X-1 Machbuster Automatic or the Seiko Prospex Land Mechanical GMT?

The AVI-8 Bell X-1 Machbuster Automatic is rated to 50m versus 20m for the Seiko Prospex Land Mechanical GMT.

Which has a longer power reserve, the AVI-8 Bell X-1 Machbuster Automatic or the Seiko Prospex Land Mechanical GMT?

The Seiko Prospex Land Mechanical GMT carries a 72-hour power reserve against 40 hours on the AVI-8 Bell X-1 Machbuster Automatic.

Side by side

AVI-8 Bell X-1 Machbuster AutomaticvsSeiko Prospex Land Mechanical GMT

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

AVI-8 Bell X-1 Machbuster Automatic

bell-x-1-machbuster-automatic-graphite-black-av-4115-01

MSRP $350

Seiko Prospex Land Mechanical GMT

spb377j1

MSRP $1,150

At a glance

14 of 29 specs differ

Diameter

Bell X-1 Machbuster Automatic—

Prospex Land Mechanical GMT39.5mm

Power Reserve

Bell X-1 Machbuster Automatic40h

Prospex Land Mechanical GMT72h

Water Resistance

Bell X-1 Machbuster Automatic50m

Prospex Land Mechanical GMT200m

MSRP

Bell X-1 Machbuster Automatic$350

Prospex Land Mechanical GMT$1,150

Full specifications

Case

7 specs

Crystal & Dial

3 specs

Crystal Shape

Flat

Curved

AR Coating

Inner

Anti-reflective coating on inner surface

Lume

None

LumiBrite on hands and index(es)

Movement

3 specs

Caliber

—

6R54

Power Reserve

40h

72h

Jewels

Pricing

1 specs

MSRP

$350

$1,150

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