This is 3D printed, 16 century Replica of Galileo's Pendulum Escapement. I used Anycubic Photon Mono SE 3D Printer but you can use any. File for download GalileoPendulum_all_STLs.zip have 19 *.stl files that you need in order to 3D print workable unit. After printing (depends of the quality of your printer) it would need some sanding and adjusting. It is a beautiful history piece that will bring nothing but joy and smile to your face once yo put it to work. For any questions please do contact me.