Casio GM-S2110BP-5AvsLum-Tec Solar Marine
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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.
GM-S2110BP-5A
Solar Marine
Diameter
40.5mm
39mm
Lug-to-Lug
n/a
43.5mm
Thickness
11mm
10.7mm
lowest
Water Resistance
200m
300m
highest
MSRP
$210
lowest
$545
Movement
5730
Seiko VS42
Case
6 specsCrystal & Dial
2 specsMovement
2 specsPricing
1 specsReviews
Synthesized for each watch independently from owner discussions, enthusiast forums, written reviews, and video reviewers.
Owners note the Casio GM-S2110BP-5A's strap gets dirty easily but cleans well, and the watch itself resists scratches during frequent wear. Some owners lament the lack of a positive display and find the lume could be brighter. A metal conversion kit is available, transforming the watch into a daily wearer. Overall, owners appreciate the Casio GM-S2110BP-5A for its scratch resistance and the potential for customization via modding kits.
The Lum-Tec Solar Marine is widely praised for its excellent lume, robust build quality, and fantastic finishing, making it a great grab-and-go tool watch. Owners appreciate its solar-powered quartz movement for low-maintenance performance and its comfortable 39mm case size, though some feel it wears smaller. One owner notes that the PVD coating may wear and chip over time. The Lum-Tec Solar Marine is highly regarded for its exceptional lume and quality finishing at its price point.
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