Glycine Combat SubvsMomentum M20 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.

Combat Sub

M20 GMT
Diameter
40mm
42mm
Lug-to-Lug
n/a
50mm
Thickness
11.2mm
lowest
13mm
Water Resistance
200m
200m
MSRP
$225
lowest
$315
Movement
515
Ronda 515
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 Combat Sub for its slim profile, with multiple sources noting thicknesses around 10.4mm to 10.8mm, and its well-proportioned, non-homage design that wears comfortably. Reviewers and owners consistently highlight its exceptional value and quality for the price, with one owner reporting accuracy rivaling COSC standards and exceptional durability. The bezel action is described as buttery smooth, and the dial features tasteful indices and crisp fonts, with one specific gold and blue variant lauded for its refined aesthetic. However, multiple sources flag the lume as sub-par and difficult to read at night, and some owners note inconsistent power reserve. Overall, owners and reviewers rate the Glycine Combat Sub highly for its exceptional value and slim, comfortable wearability.
The slim case profile and comfortable wearability are praised. The bezel action received criticism for having slight play and a less-than-satisfying click.
Owners widely praise the Momentum M20 GMT for its robust build quality, sapphire crystal, and satisfying 120-click bezel action, with many finding its 42mm case wears comfortably like a 40mm due to curved lugs. The bracelet is frequently highlighted as exceptionally comfortable and superior to aftermarket options. Some owners note the second hand occasionally misses markers, and one found the lume inadequate. On balance, owners rate the Momentum M20 GMT highly for its tool watch utility and comfortable, robust bracelet at its price point.
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