AVI-8 Flyboy Airmaster GMT AutomaticvsUndone Basecamp Stealth Automatic
lug2lug doesn't sell watches. Buy links open the brand's or seller's own site. Some links are affiliate links: lug2lug may earn a commission at no extra cost to you. Disclosures
Measurements
Catalog photos are all shot at the same flattering size. These aren't: every case below shares one millimeter scale.

Flyboy Airmaster GMT Automatic

Basecamp Stealth Automatic
Diameter
40mm
40mm
Water Resistance
50m
100m
highest
MSRP
$345
lowest
$432
Movement
Seiko NH34
Seiko NH34
Case
5 specsCrystal & Dial
2 specsMovement
1 specsPricing
1 specsReviews
Synthesized for each watch independently from owner discussions, enthusiast forums, written reviews, and video reviewers.
Owners widely praise the AVI-8 Flyboy Airmaster GMT Automatic for its unique aviator style, robust build, and crisp dial texture, with one owner noting a complex three-timezone function. The watch is considered fun and wearable with solid dimensions, though some find the dial busy and difficult to read, and the stock strap is noted as cheap with limited lug hole options. Some owners question the quality relative to price, while others acknowledge that AVI-8 watches, often featuring Seiko NH34 movements, are generally considered decent for their $100-$200 price point. On balance, owners rate the AVI-8 Flyboy Airmaster GMT Automatic well for its standout aviator design and value at the price.
The Undone Basecamp Stealth Automatic is praised for its versatile 40mm case proportions and the reliability of its Seiko NH34 automatic movement. Owners report it keeps time within approximately 20 seconds per week. Some iterations are critiqued for a date window placement between 4 and 5 o'clock. Overall, owners and reviewers rate the Undone Basecamp Stealth Automatic well for its reliable movement and wearable case size.
Similar watches
Matched to the watches above on size, movement, style and price, microbrands first. Open any one to dig in.
Also compared
Comparisons nearby in the catalog: alternatives to the watches above paired against the matchup.











