![Pegor's F91 Kepler Is a Work-in-Progress Open-Hardware Smartwatch Reboot of Casio's Classic F-91W - Hackster.io Pegor's F91 Kepler Is a Work-in-Progress Open-Hardware Smartwatch Reboot of Casio's Classic F-91W - Hackster.io](https://hackster.imgix.net/uploads/attachments/1471252/image_Ik6nEVLziE.png?auto=compress%2Cformat)
Pegor's F91 Kepler Is a Work-in-Progress Open-Hardware Smartwatch Reboot of Casio's Classic F-91W - Hackster.io
![Always wanted an F91 with a completely transparent case but could never find one. So 3D printed a case, made a quick mold, cast it in clear resin and pressure chambered it Always wanted an F91 with a completely transparent case but could never find one. So 3D printed a case, made a quick mold, cast it in clear resin and pressure chambered it](https://i.redd.it/441u4qabdoxa1.jpg)
Always wanted an F91 with a completely transparent case but could never find one. So 3D printed a case, made a quick mold, cast it in clear resin and pressure chambered it
![STL file Casio F91W Watch Case "Bat Ears" design, high precision model.・Model to download and 3D print・Cults STL file Casio F91W Watch Case "Bat Ears" design, high precision model.・Model to download and 3D print・Cults](https://files.cults3d.com/uploaders/25798391/illustration-file/da4b439e-d2fc-49ea-b970-1b4afab64e08/container_casio-f91w-case-original-design-3d-printing-495172.jpg)