Side by side

AVI-8 Flyboy Airmaster GMT AutomaticvsTudor Black Bay 58 Bronze

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
Black Bay 58 Bronze
TudorBlack Bay 58 Bronze
MSRP $5,850

At a glance

18 of 29 specs differ
Diameter
Flyboy Airmaster GMT Automatic40mm
Black Bay 58 Bronze39mm
Power Reserve
Flyboy Airmaster GMT Automatic40h
Black Bay 58 Bronze70h
Water Resistance
Flyboy Airmaster GMT Automatic50m
Black Bay 58 Bronze200m
MSRP
Flyboy Airmaster GMT Automatic$365
Black Bay 58 Bronze$5,850

Full specifications

Case

9 specs
Category
GMT
Diver
Diameter
40mm
39mm
Thickness
11.9mm
Lug-to-Lug
46mm
Lug Width
20mm
Material
316L Stainless Steel
Bronze
Finish
Brushed and polished
Brushed + Satin
Water Resistance
50m
200m
Caseback
Solid
Engraved

Crystal & Dial

2 specs
Crystal Shape
Flat
AR Coating
Inner

Movement

6 specs
Caliber
NH34
MT5400
Beat Rate
28,800 vph
0 vph
Power Reserve
40h
70h
Jewels
25
0
Hacking
Yes
No
Hand-winding
Yes
No

Pricing

1 specs
MSRP
$365
$5,850

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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.

Tudor Black Bay 58 Bronze

The Tudor Black Bay 58 Bronze is widely praised for its unique, evolving aesthetic driven by its developing bronze patina, which owners describe as an incremental pleasure and a conversation starter. Reviewers highlight its warm, vintage feel, achieved through the aging bronze case, root-beer brown bezel, and rose gold-toned dive scale, complemented by applied Arabic numerals on a 39mm case. The MT5400 movement is noted for its 70-hour power reserve and COSC-certified accuracy, with one owner reporting a net loss of about one second every three days. The bezel action is described as firm and reassuring, tighter than steel Black Bay models. Owners report the watch wears well dressed up or down, and its finishing is favorably compared to higher-end brands. However, some owners note the soft bronze case scratches easily and can cause blueing on the wrist in hot weather.

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