Side by side

AVI-8 Flyboy Airmaster GMT AutomaticvsZelos Helica Moonphase

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
Helica Moonphase
ZelosHelica Moonphase
MSRP $1,049

At a glance

9 of 29 specs differ
Diameter
Flyboy Airmaster GMT Automatic40mm
Helica Moonphase39mm
Power Reserve
Flyboy Airmaster GMT Automatic40h
Helica Moonphase40h
Water Resistance
Flyboy Airmaster GMT Automatic50m
Helica Moonphase100m
MSRP
Flyboy Airmaster GMT Automatic$365
Helica Moonphase$1,049

Full specifications

Case

6 specs
Category
GMT
Moonphase
Diameter
40mm
39mm
Thickness
10mm
Lug-to-Lug
39mm
Lug Width
20mm
Water Resistance
50m
100m

Crystal & Dial

1 specs
Dial Color
Black
Meteorite

Movement

1 specs
Caliber
NH34
Sellita SW288 Moonphase

Pricing

1 specs
MSRP
$365
$1,049

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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.

Zelos Helica Moonphase

Owners widely praise the Zelos Helica Moonphase for its gorgeous aventurine dial, unique industrial-dress aesthetic, and comfortable wearability, with one owner calling it spectacular and another their favorite Zelos. The moonphase complication is frequently highlighted as beautiful, though some find the double moon distracting or the dial cluttered. A manual-wind movement combined with a screw-down crown is noted as a drawback by some, requiring adjustment and potentially feeling fragile when fully wound, while one owner reports a 43-hour power reserve. On balance, owners rate the Zelos Helica Moonphase highly for its stunning aventurine dial and unique design at its price point.

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