Watch case for ETA 2842 (swatch), 2789 and 2824 movements

This is a simple case for ETA movements (2789, 2824 and 2842). To assemble the case, you will need a 31mm crystal and a 30mm rubber ring. The case fit to a 18mm wide watch strap. Feel free to use and print this model, but if you use it for a video or a remake, please dont forget to insert a link in your description for the original files. Thanks.