Which is cheaper, the AVI-8 Flyboy Airmaster GMT Automatic or the Grand Seiko SBGW306?

At MSRP the AVI-8 Flyboy Airmaster GMT Automatic is the cheaper of the two at $365, against $17,900 for the Grand Seiko SBGW306 — a $17,535 gap before any retailer discounting.

Which is bigger, the AVI-8 Flyboy Airmaster GMT Automatic or the Grand Seiko SBGW306?

The AVI-8 Flyboy Airmaster GMT Automatic wears larger at 40mm versus 36.5mm for the Grand Seiko SBGW306 — a 3.5mm difference across the dial.

Which has better water resistance, the AVI-8 Flyboy Airmaster GMT Automatic or the Grand Seiko SBGW306?

The Grand Seiko SBGW306 is rated to 100m versus 50m for the AVI-8 Flyboy Airmaster GMT Automatic.

Which has a longer power reserve, the AVI-8 Flyboy Airmaster GMT Automatic or the Grand Seiko SBGW306?

The Grand Seiko SBGW306 carries a 72-hour power reserve against 40 hours on the AVI-8 Flyboy Airmaster GMT Automatic.

What movement does the AVI-8 Flyboy Airmaster GMT Automatic run compared to the Grand Seiko SBGW306?

The AVI-8 Flyboy Airmaster GMT Automatic runs a automatic caliber (NH34), while the Grand Seiko SBGW306 runs a manual (9S64).

Side by side

AVI-8 Flyboy Airmaster GMT AutomaticvsGrand Seiko SBGW306

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

AVI-8 Flyboy Airmaster GMT Automatic

flyboy-airmaster-gmt-automatic-engine-black-av-4128-01

MSRP $365

Grand Seiko SBGW306

sbgw306j

MSRP $17,900

At a glance

12 of 29 specs differ

Diameter

Flyboy Airmaster GMT Automatic40mm

SBGW30636.5mm

Power Reserve

Flyboy Airmaster GMT Automatic40h

SBGW30672h

Water Resistance

Flyboy Airmaster GMT Automatic50m

SBGW306100m

MSRP

Flyboy Airmaster GMT Automatic$365

SBGW306$17,900

Full specifications

Case

7 specs

Crystal & Dial

1 specs

AR Coating

Inner

Yes

Movement

3 specs

Caliber

NH34

9S64

Type

Automatic

Manual

Power Reserve

40h

72h

Pricing

1 specs

MSRP

$365

$17,900

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