Side by side

AVI-8 Flyboy Airmaster GMT AutomaticvsSeiko Prospex SPEEDTIMER

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
Prospex SPEEDTIMER
SeikoProspex SPEEDTIMER
MSRP $750

At a glance

13 of 29 specs differ
Diameter
Flyboy Airmaster GMT Automatic40mm
Prospex SPEEDTIMER41.4mm
Power Reserve
Flyboy Airmaster GMT Automatic40h
Prospex SPEEDTIMER40h
Water Resistance
Flyboy Airmaster GMT Automatic50m
Prospex SPEEDTIMER100m
MSRP
Flyboy Airmaster GMT Automatic$365
Prospex SPEEDTIMER$750

Full specifications

Case

7 specs
Category
GMT
Chronograph
Diameter
40mm
41.4mm
Thickness
13mm
Lug-to-Lug
45.9mm
Lug Width
21mm
Material
316L Stainless Steel
Stainless Steel
Water Resistance
50m
100m

Crystal & Dial

3 specs
Crystal Shape
Flat
Curved
AR Coating
Inner
Anti-reflective coating on inner surface
Lume
None
LumiBrite on hands and index(es)

Movement

2 specs
Caliber
NH34
V192
Type
Automatic
Quartz

Pricing

1 specs
MSRP
$365
$750

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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.

Seiko Prospex SPEEDTIMER

Owners widely praise the Seiko Prospex SPEEDTIMER's design, with specific mentions of its beautiful ice blue sundial and compact 39mm case size, which some note wears smaller than its specifications due to a short lug-to-lug distance. Reviewers highlight its racing-inspired aesthetic and versatility, with one owner finding the 39mm solar model a sturdy and reliable everyday watch with 100m water resistance. However, some owners question the value proposition, citing the $700 price for a solar quartz model and a thickness of 13mm, while others expressed a preference for automatic movements. On balance, owners and reviewers appreciate the Seiko Prospex SPEEDTIMER's attractive vintage-inspired design and compact wearability, though some debate its value and thickness for a solar quartz chronograph.

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