Which is cheaper, the AVI-8 Flyboy Airmaster GMT Automatic or the Grand Seiko SBGA384?

At MSRP the AVI-8 Flyboy Airmaster GMT Automatic is the cheaper of the two at $365, against $29,500 for the Grand Seiko SBGA384 — a $29,135 gap before any retailer discounting.

Which has better water resistance, the AVI-8 Flyboy Airmaster GMT Automatic or the Grand Seiko SBGA384?

The Grand Seiko SBGA384 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 SBGA384?

The Grand Seiko SBGA384 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 SBGA384?

The AVI-8 Flyboy Airmaster GMT Automatic runs a automatic caliber (NH34), while the Grand Seiko SBGA384 runs a spring drive (9R15).

Side by side

AVI-8 Flyboy Airmaster GMT AutomaticvsGrand Seiko SBGA384

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 SBGA384

sbga384g

MSRP $29,500

At a glance

11 of 29 specs differ

Diameter

Flyboy Airmaster GMT Automatic40mm

SBGA38440mm

Power Reserve

Flyboy Airmaster GMT Automatic40h

SBGA38472h

Water Resistance

Flyboy Airmaster GMT Automatic50m

SBGA384100m

MSRP

Flyboy Airmaster GMT Automatic$365

SBGA384$29,500

Full specifications

Case

6 specs

Crystal & Dial

1 specs

AR Coating

Inner

Yes

Movement

3 specs

Caliber

NH34

9R15

Type

Automatic

Spring Drive

Power Reserve

40h

72h

Pricing

1 specs

MSRP

$365

$29,500

Follow this matchup

Get a note when AVI-8 Flyboy Airmaster GMT Automatic vs Grand Seiko SBGA384 gets more votes, a community discussion, or a price drop. No account needed.

Keep exploring