Citphto O.M. is a rotary ostinato machine made by Bart Hopkin.
Thanks to Tim Phillips for the excellent idea of using magnetic attachment to make the positioning of the sound components continuously adjustable.
For another of Bart's ostinato machines (a much larger and more elaborate one), see this video: https://www.youtube.com/watch?v=nAo-q2iqjjI.
For more on the wider world of rotary music machines, here's an essay on the topic: https://barthopkin.com/rotary-music-machines.
To see more of Bart's instruments of all sorts, visit the Instrumentarium at BartHopkin.com, or look for videos of other instruments on the Bart Hopkin youtube channel.
