Side by side

AVI-8 Flyboy Airmaster GMT AutomaticvsSugess MoonPhase Master S389

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

Flyboy Airmaster GMT Automatic
AVI-8Flyboy Airmaster GMT Automatic
MSRP $365
MoonPhase Master S389
SugessMoonPhase Master S389
MSRP $599

At a glance

14 of 29 specs differ
Diameter
Flyboy Airmaster GMT Automatic40mm
MoonPhase Master S38940mm
Power Reserve
Flyboy Airmaster GMT Automatic40h
MoonPhase Master S38935h
Water Resistance
Flyboy Airmaster GMT Automatic50m
MoonPhase Master S38950m
MSRP
Flyboy Airmaster GMT Automatic$365
MoonPhase Master S389$599

Full specifications

Case

6 specs
Category
GMT
Chronograph
Thickness
12mm
Lug-to-Lug
46mm
Lug Width
20mm
Material
316L Stainless Steel
Stainless Steel
Caseback
Solid
Display

Crystal & Dial

2 specs
Dial Color
Black
2 Salmon
Lume
None
Tritium

Movement

5 specs
Caliber
NH34
Seagull ST19
Type
Automatic
Manual
Beat Rate
28,800 vph
3 vph
Power Reserve
40h
35h
Complications
None
GMT, Chronograph, Moonphase, Date

Pricing

1 specs
MSRP
$365
$599

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What people say

Owners + reviewers, side by side

Synthesized for each watch independently from owner discussions, enthusiast forums, written reviews, and video reviewers.

AVI-8 Flyboy Airmaster GMT Automatic

Owners widely praise the AVI-8 Flyboy Airmaster GMT Automatic for its robust build quality, intricate three-timezone function, and crisp dial texture. The watch is noted for its wearable 41mm case size and 48.5mm lug-to-lug, with an internally positioned GMT complication that maintains a clean dial appearance. Some owners report the stock leather strap feels cheap and limits strap changing options. On balance, owners rate the AVI-8 Flyboy Airmaster GMT Automatic highly for its solid finishing and value, particularly highlighting the dial's depth and texture.

Sugess MoonPhase Master S389

Owners widely praise the Sugess MoonPhase Master S389 for its beautiful dial and glowing moonphase, with some finding it a stunner that exceeds expectations and a bargain for the price. However, reviewers and owners alike flag rotor noise and thickness as potential drawbacks, and one owner reported receiving a defective unit. Accuracy is reported at -6 seconds per day, and while the dial features applied markers and polished hands, the movement finishing is noted as rough under magnification. Overall, owners rate the Sugess MoonPhase Master S389 highly for its aesthetic appeal and value, despite some concerns regarding rotor noise and build quality consistency.

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