You will need supports for the upper and bottom heads. Print them with the inner face down, so that the support marks do not appear.
When assembling it, pay attention to the alignment of the body lines. The hoops can be placed with the 'ends' aligned, if you want to. Use glue.
In Brazil the biggest coin has 27mm in diameter and 1.95mm thick.
The author marked this model as their own original creation. Imported from Thingiverse.