Side by side

AVI-8 Flyboy Airmaster GMT AutomaticvsSeestern S446 GMT

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
S446 GMT
SeesternS446 GMT
MSRP $299

At a glance

13 of 29 specs differ
Diameter
Flyboy Airmaster GMT Automatic40mm
S446 GMT39.5mm
Power Reserve
Flyboy Airmaster GMT Automatic40h
S446 GMT41hh
Water Resistance
Flyboy Airmaster GMT Automatic50m
S446 GMT100m
MSRP
Flyboy Airmaster GMT Automatic$365
S446 GMT$299

Full specifications

Case

5 specs
Diameter
40mm
39.5mm
Thickness
13mm
Lug-to-Lug
47mm
Lug Width
20mm
Water Resistance
50m
100m

Crystal & Dial

2 specs
Crystal Shape
Flat
Domed
Dial Color
Black
Cream

Movement

5 specs
Caliber
NH34
Seiko NH34A GMT
Beat Rate
28,800 vph
3 vph
Power Reserve
40h
41hh
Jewels
25
24
Complications
None
GMT, Date

Pricing

1 specs
MSRP
$365
$299

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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.

Seestern S446 GMT

Owners widely praise the Seestern S446 GMT for its stunning finishing and extreme value, with a sapphire crystal and adjustable clasp. The winding action is noted as buttery smooth, and the 39.5mm case size is considered very wearable. Some owners, however, flag the lume as a weak point and one owner found the bracelet clasp lacked sufficient micro-adjustment. The Seestern S446 GMT is considered an extreme value for the dollar. Overall, owners rate the Seestern S446 GMT highly for its exceptional finishing and value proposition at its price point.

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