Side by side

AVI-8 Flyboy Airmaster GMT AutomaticvsBaltic Hermétique Summer

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
Hermétique Summer
BalticHermétique Summer
MSRP $594

At a glance

13 of 29 specs differ
Diameter
Flyboy Airmaster GMT Automatic40mm
Hermétique Summer37mm
Power Reserve
Flyboy Airmaster GMT Automatic40h
Hermétique Summer42h
Water Resistance
Flyboy Airmaster GMT Automatic50m
Hermétique Summer150m
MSRP
Flyboy Airmaster GMT Automatic$365
Hermétique Summer$594

Full specifications

Case

7 specs
Category
GMT
Dress
Diameter
40mm
37mm
Thickness
10.8mm
Lug-to-Lug
46mm
Lug Width
20mm
Material
316L Stainless Steel
Stainless Steel
Water Resistance
50m
150m

Crystal & Dial

3 specs
AR Coating
Inner
Yes
Dial Color
Black
Orange
Lume
None
BGW9

Movement

2 specs
Caliber
NH34
Miyota 9039
Power Reserve
40h
42h

Pricing

1 specs
MSRP
$365
$594

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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.

Baltic Hermétique Summer

Reviewers highlight the Baltic Hermétique Summer's compact 37mm brushed case with a polished bezel and 150 meters of water resistance. The watch features glossy dials in bright colors with raised BGW9 Super-LumiNova indices that emit a strong blue glow, and it comes with color-matched FKM rubber straps or Baltic bracelets. The Miyota 9039 movement supports hacking and hand-winding. However, the recessed crown can be difficult to manipulate if fingernails are not long enough, and the movement has a stated accuracy of -10/+30 seconds per day. Overall, reviewers praise the Baltic Hermétique Summer for its well-balanced, colorful dials and strong lume at an affordable price point.

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