Side by side

AVI-8 Flyboy Airmaster GMT AutomaticvsTudor Black Bay One 31 S&G

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 One 31 S&G
TudorBlack Bay One 31 S&G
MSRP $6,850

At a glance

12 of 29 specs differ
Diameter
Flyboy Airmaster GMT Automatic40mm
Black Bay One 31 S&G31mm
Power Reserve
Flyboy Airmaster GMT Automatic40h
Black Bay One 31 S&G50h
Water Resistance
Flyboy Airmaster GMT Automatic50m
Black Bay One 31 S&G100m
MSRP
Flyboy Airmaster GMT Automatic$365
Black Bay One 31 S&G$6,850

Full specifications

Case

9 specs
Category
GMT
Diameter
40mm
31mm
Thickness
9.5mm
Lug-to-Lug
46mm
Lug Width
17mm
Material
316L Stainless Steel
Stainless Steel
Finish
Brushed and polished
Polished + Satin
Water Resistance
50m
100m
Caseback
Solid
Solid screw-down

Movement

2 specs
Caliber
NH34
MT5201
Power Reserve
40h
50h

Pricing

1 specs
MSRP
$365
$6,850

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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 One 31 S&G

The Tudor Black Bay One 31 S&G is praised for its quiet luxury, combining brushed steel and warm gold accents for understated charm. Owners appreciate the brushed gold for a casual two-tone look and the champagne dial's surprising legibility. Some find the case sides too thick, and one user expressed a desire for a smaller S&G variant. The watch features the MT5612 movement with a 70-hour power reserve and a date function, within a 200-meter water-resistant case. Overall, owners and reviewers highlight the Tudor Black Bay One 31 S&G's balanced two-tone aesthetic as its primary appeal.

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