Victor Victrola VV - VI # 498746 motor test after servicing, 1920 

@@danielkartman6992 in my case, my phone is heavy enough not to move around even at 80 or 85 RPM. Anything with a smooth case however, would probably fly right off there. I will warn anybody using the app that nausea is a possibility trying to focus on something that’s spinning like that. Tape roll idea would definitely help with a lighter phone.