Side by side

AVI-8 Flyboy Airmaster GMT AutomaticvsSeiko Diamond Collection

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
Diamond Collection
SeikoDiamond Collection
MSRP $475

At a glance

11 of 29 specs differ
Diameter
Flyboy Airmaster GMT Automatic40mm
Diamond Collection27mm
Power Reserve
Flyboy Airmaster GMT Automatic40h
Diamond Collection40h
Water Resistance
Flyboy Airmaster GMT Automatic50m
Diamond Collection50m
MSRP
Flyboy Airmaster GMT Automatic$365
Diamond Collection$475

Full specifications

Case

6 specs
Category
GMT
Dress
Diameter
40mm
27mm
Thickness
7.5mm
Lug-to-Lug
46mm
Lug Width
6mm
Material
316L Stainless Steel
Stainless Steel

Crystal & Dial

2 specs
Crystal
Sapphire
Hardlex
Lume
None
LumiBrite on hands and index(es)

Movement

2 specs
Caliber
NH34
V137
Type
Automatic
Quartz

Pricing

1 specs
MSRP
$365
$475

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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 Diamond Collection

Owners widely praise the Seiko Diamond Collection for its stunning beauty, particularly highlighting the 14 diamonds and the captivating mother-of-pearl dial, which reviewers note is difficult to photograph accurately. The watch is frequently cited as offering excellent value for its fit and finish, with specific features like sapphire crystal and 100m water resistance contributing to its appeal. One owner reports great durability and accuracy, with a solar charging reserve, though notes that the gold plating on the bracelet shows some fading from desk work. Overall, owners rate the Seiko Diamond Collection highly for its dazzling aesthetics and perceived value.

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