Side by side

AVI-8 Flyboy Airmaster GMT AutomaticvsSeiko King Seiko KSK

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
King Seiko KSK
SeikoKing Seiko KSK
MSRP $3,300

At a glance

12 of 29 specs differ
Diameter
Flyboy Airmaster GMT Automatic40mm
King Seiko KSK38.6mm
Power Reserve
Flyboy Airmaster GMT Automatic40h
King Seiko KSK45h
Water Resistance
Flyboy Airmaster GMT Automatic50m
King Seiko KSK50m
MSRP
Flyboy Airmaster GMT Automatic$365
King Seiko KSK$3,300

Full specifications

Case

6 specs
Category
GMT
Dress
Diameter
40mm
38.6mm
Thickness
10.7mm
Lug-to-Lug
45.8mm
Lug Width
19mm
Material
316L Stainless Steel
Stainless Steel

Crystal & Dial

2 specs
Crystal Shape
Flat
Box
AR Coating
Inner
Anti-reflective coating on inner surface

Movement

3 specs
Caliber
NH34
6L35
Power Reserve
40h
45h
Jewels
25
26

Pricing

1 specs
MSRP
$365
$3,300

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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 King Seiko KSK

Owners and reviewers widely praise the King Seiko KSK for its exceptional dial and case finishing, often compared to higher-end brands, and its slim, retro design. The use of the Calibre 6L35 movement in some variants is seen as a significant upgrade, contributing to a refined feel, while others note the bracelet is unusually nice and the case offers a mix of brushed and polished finishes with sharp angles. However, some owners question the value proposition, citing misaligned screws and clasp components on their examples, and the standard 6R movement in some models is criticized as a disappointment for the price point. Accuracy figures range from +15/-10 seconds per day to +5 to +7 seconds per day, and water resistance is rated at 5 BAR or 50 meters. Overall, owners and reviewers find the King Seiko KSK to be a beautiful and classy watch with fantastic finishing, though some are divided on its value and movement choice at its price point.

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