Casio GMC-2500vsLuminox Navy SEAL 3500 Semper Fortis 45mm

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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.

Casio GMC-2500 at true scale

GMC-2500

Luminox Navy SEAL 3500 Semper Fortis 45mm at true scale

Navy SEAL 3500 Semper Fortis 45mm

Diameter

43.8mm

45mm

Thickness

12.9mm

lowest

14mm

Water Resistance

200m

200m

MSRP

$280

lowest

$695

Movement

5757

Ronda 515

Case

4 specs
Diameter
43.8mm
45mm
Thickness
12.9mm
14mm
Lug Width
n/a
24mm
Material
Resin / Stainless steel
CARBONOX™

Movement

1 specs
Caliber
5757
Ronda 515

Pricing

1 specs
MSRP
$280
$695
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Reviews

Synthesized for each watch independently from owner discussions, enthusiast forums, written reviews, and video reviewers.

Casio GMC-2500

Owners widely describe the Casio GMC-2500 as comfortable and not oversized despite its 43.8mm case, with one saying it feels perfect and that G-Shock wearers will find it familiar; owners of both the metal and resin versions report a great wearing experience. Reviewers call it an exceptional running watch, praising the high-contrast yellow dial, built-in light for night runs, and the date-wheel stopwatch as a real advantage over a small chronograph subdial. The main caveats are the bracelet, which reviewers say is loose with wide link gaps and a clasp offering only three micro-adjust points, and a magnetically held hand design that one owner-sourced account says can let the minute hand wobble and briefly sit wrong after impacts, a flaw Casio itself acknowledges. Overall, owners and reviewers rate the Casio GMC-2500 well, mainly for its running usability and comfortable wear.

Luminox Navy SEAL 3500 Semper Fortis 45mm

The Luminox Navy SEAL 3500 Semper Fortis 45mm is praised for its durability, lightweight Carbonox case, and constant tritium lume ideal for low-light conditions. Owners find the 45mm case versatile for everyday and business-casual wear, noting its scratch resistance. One owner highlights the dial's "NAVY SEALS" printing as a desirable, rarer feature. However, one community voice expresses extreme dissatisfaction, calling the watches a disaster and advising against purchase. Overall, owners rate the Luminox Navy SEAL 3500 Semper Fortis 45mm highly for its rugged build and reliable tritium illumination.

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