Glycine Combat Sub SportvsSheffield SUPERPRODUCTION
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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

SUPERPRODUCTION
Diameter
39mm
40mm
Lug-to-Lug
n/a
48mm
Thickness
11.2mm
lowest
12.6mm
Water Resistance
300m
highest
200m
Power Reserve
38h
38h
MSRP
$540
n/a
Movement
Sellita SW200-1
Sellita SW200-1
Case
6 specsCrystal & Dial
5 specsMovement
3 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 Sport for its thinness, with various sources citing measurements between 10.4mm and 10.8mm, and its comfortable wearability due to contoured lugs that make it feel smaller than its 39mm case size. Reviewers and owners consistently highlight its value, with some considering it the best dive watch under $400 and noting its refined finishing and smooth winding action. However, opinions are mixed on its design, with some finding it unique and others plain or questioning its homage status. Lume quality is a point of contention, with some finding it subpar and hard to read at night, while others describe it as marginally better than a Seiko SKX007. Some owners have also reported inconsistent power reserve or stem issues. Overall, owners and reviewers rate the Glycine Combat Sub Sport highly for its exceptional thinness and value proposition at the price point.
Owners widely praise the Sheffield SUPERPRODUCTION for its attractive blue dial and overall quality at an affordable price. The bezel action is generally well-regarded, though one owner suggests it could be crisper. The Sellita SW200-1 movement is reported to be accurate, with one owner observing a gain of 3 seconds over 24 hours. The 40mm case is noted by one owner to feel smaller than expected, and the crown is described as finicky and tight for winding and setting. On balance, owners rate the Sheffield SUPERPRODUCTION highly for its dial and value proposition, despite minor criticisms of the crown and case size perception.
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