Side by side

AVI-8 Flyboy Airmaster GMT AutomaticvsSpinnaker Spence 300

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
Spence 300
SpinnakerSpence 300
MSRP $650

At a glance

8 of 29 specs differ
Diameter
Flyboy Airmaster GMT Automatic40mm
Spence 30040mm
Power Reserve
Flyboy Airmaster GMT Automatic40h
Spence 30040h
Water Resistance
Flyboy Airmaster GMT Automatic50m
Spence 300300m
MSRP
Flyboy Airmaster GMT Automatic$365
Spence 300$650

Full specifications

Case

5 specs
Category
GMT
Diver
Thickness
11.5mm
Lug-to-Lug
48mm
Lug Width
20mm
Water Resistance
50m
300m

Crystal & Dial

1 specs
Dial Color
Black
Aquamarine

Movement

1 specs
Caliber
NH34
SII NH35A

Pricing

1 specs
MSRP
$365
$650

Follow this matchup

Get a note when AVI-8 Flyboy Airmaster GMT Automatic vs Spinnaker Spence 300 gets more votes, a community discussion, or a price drop. No account needed.

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.

Spinnaker Spence 300

The Spinnaker Spence 300 is widely praised for its slim 10.9mm case and 40mm diameter, offering a comfortable and uncommon thin diver design at its price point. Reviewers and owners highlight its value, especially below $350, and its blend of retro design with modern specifications, including a 300m depth rating and a fully indexed bezel. Some owners, however, find the dial printing and bracelet finishing to be less refined, with one noting the bracelet's male end links as a drawback. The consensus is that the Spinnaker Spence 300 is highly regarded for its exceptional value and wearable dimensions, making it a strong contender for an everyday sports watch.

Keep exploring

More watches worth a look

Matched to the watches above on size, movement, style and price — microbrands first. Open any one to dig in.

Adjacent matchups

People also compared

Comparisons nearby in the catalog — alternatives to the watches above paired against the matchup.