This is a flywheel for LoboCNC's Gyroman, which is made to fit Australian 1 cent coins as pictured.
You'll need 9 stacks of 13 coins, all of which adds up to a mass of about 350 grams. The greater the mass, the longer it should spin.
Tested on UP! Plus 2 Printer (Afinia)
I printed mine at:
Layer height: 0.2mm