Glycine Airman GMTvsZelos Spearfish GMT
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Measurements
Catalog photos are all shot at the same flattering size. These aren't: every case below shares one millimeter scale.

Airman GMT

Spearfish GMT
Diameter
42mm
40mm
Thickness
12mm
lowest
13mm
Water Resistance
100m
200m
highest
Power Reserve
48h
n/a
MSRP
$905
lowest
$999
Movement
Sellita SW330-2
Sellita SW330-2
Case
7 specsCrystal & Dial
5 specsMovement
4 specsPricing
1 specsReviews
Synthesized for each watch independently from owner discussions, enthusiast forums, written reviews, and video reviewers.
Owners widely praise the Glycine Airman GMT's classic pilot design and consider it a well-made watch. Some owners find the GMT hand visually similar to the minute hand, which can be frustrating. The Sellita-based movement kept acceptable accuracy. On balance, owners and reviewers appreciate the Glycine Airman GMT for its classic pilot design and build quality.
Owners widely praise the Zelos Spearfish GMT for its exceptional value and build quality, with one owner noting it garners more compliments than higher-end watches. Reviewers highlight its excellent machining, flawless finishing, and a superb bracelet featuring tool-less micro-adjustment that surpasses its price point. The watch is powered by a Sellita SW330-2 automatic movement. Some owners report accuracy around +2.6 seconds per day, while others note a minor compromise in end link fit. Overall, owners and reviewers rate the Zelos Spearfish GMT highly for its impressive finishing and bracelet at its $645 price.
The bezel action is a strong point. The bracelet quality is a weakness. Reviewers disagreed on the dial material, with some mentioning aventurine and others meteorite.
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