Glycine Combat Sub SportvsSpinnaker Spence 300
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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 Sport

Spence 300
Diameter
39mm
40mm
Lug-to-Lug
n/a
48mm
Thickness
11.2mm
lowest
11.5mm
Water Resistance
300m
300m
Power Reserve
41h
n/a
MSRP
$540
lowest
$650
Movement
Sellita SW200-1
Seiko NH35
Case
5 specsCrystal & Dial
1 specsMovement
2 specsPricing
1 specsReviews
Synthesized for each watch independently from owner discussions, enthusiast forums, written reviews, and video reviewers.
Owners widely praise the Glycine Men's Combat Sub Sport 39mm Automatic Watch for its excellent value, with many considering it the best watch they own for its price point. Its solid build, reliability, and attractive design are frequently highlighted, alongside a surprisingly thin profile and comfortable wearability for daily use. Some owners report accurate timekeeping around +3 seconds per day, and the bezel action is described as satisfyingly clicky. One owner notes that their 4-year-old Glycine Combat Sub still exhibits excellent quality. The 39mm size is particularly favored for its sleekness and versatility, with some regretting not choosing it over larger variants. On balance, owners rate the Glycine Men's Combat Sub Sport 39mm Automatic Watch highly for its exceptional value and well-executed design.
Owners widely praise the Spinnaker Spence 300 for its slim 10.9mm case and 40mm diameter, offering a comfortable and versatile wear. Reviewers and owners alike highlight its value, with some seeing it as a budget alternative to more expensive dive watches. The watch features a Seiko NH35 automatic movement and 300m water resistance. However, some community members find the dial printing and bracelet finishing to be less refined, and a few suggest other brands offer better value at similar price points. On balance, owners and reviewers rate the Spinnaker Spence 300 highly for its impressive case dimensions and overall value proposition.
The watch's thin 10.9mm profile for a 300m diver is a key strength. No shared weakness was identified.
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