Glycine Airman SST GMTvsSpinnaker Dumas 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 SST GMT

Dumas GMT
Diameter
43mm
44mm
Lug-to-Lug
n/a
48mm
Thickness
11.6mm
lowest
15mm
Water Resistance
200m
300m
highest
Power Reserve
48h
n/a
MSRP
$905
$399
lowest
Movement
Sellita SW330-2
Seiko NH34
Case
7 specsCrystal & Dial
5 specsMovement
5 specsPricing
1 specsReviews
Synthesized for each watch independently from owner discussions, enthusiast forums, written reviews, and video reviewers.
Owners widely praise the Glycine Airman SST GMT for its comfortable wear, good build quality, accuracy, lume, historical significance, and ingenious GMT movement. The 24-hour dial and compressor-style GMT ring are highlighted as great features, and the watch is noted for keeping good time. Some owners expect Glycine branding on the Sellita SW330-2 movement rotor, and one owner experienced the watch stopping after a day on a winder with a rattling rotor, suggesting a service. The dial is considered busy by some, and it is harder to purchase than some alternatives. Overall, owners rate the Glycine Airman SST GMT highly for its comfortable wear and historical significance as a descendant of the original Airman.
The Spinnaker Dumas GMT is praised for its good finishing and satisfying lume, including on the crown. Owners note its 44mm case and 15mm thickness, with one finding it wears well on a 17cm wrist, while a reviewer suggests its substantial size and 209g weight make it unsuitable for smaller wrists. Overall, owners and reviewers find the Spinnaker Dumas GMT offers good value, particularly with the inclusion of an extra rubber strap.
The Spinnaker Dumas GMT offers robust build quality for its price point. Reviewers noted the 300-meter water resistance.
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