Case Model

The GWM5610 is the classic 80s Casio G-Shock with all the retro(?) modern features: radio time synchronization, two time zones, alarm, stopwatch, timer, water resistant to 200m, motion-activated light and solar charging.  The watch is comfortable, but I wanted to try it on a nato strap and I don’t like the off-the-shelf strap adapters.  This watch has a sealed inner housing that attaches to the outer bezel and strap. If it fits well, a newly designed outer bezel should be a simple swap.

I started with 3D scans of the inner module, but they were a little awkward, especially with reflections from the buttons.  The scans were a good reference, but it was easier to work with calipers to take key measurements.

The model was created in Rhino, using Grasshopper to make it parametric so I could alter dimensions or tolerances after the first test print.  I use a method of creating base shapes and cutting shapes, and adding and subtracting to make the final part. It’s oddly satisfying to get a functional, adjustable model.

I went through many plastic prints, refining small features and dimensions and eventually printed in titanium. Perfect fit!