by Opertum, published
Coins come in two flavors; In and Out. Pick which ever you prefer.
Your slicer may have issues with the thin walls of Out versions, either narrow the extrusion diameter or use a smaller orifice nozzle.
Made using Inkscape to generate a svg and Tinkercad to extrude it into 3 dimensions and add a base.
Update 3: Moar Coins! Also modified my method, so the old coins are retired. If you really want them, they will be in the V1 zip file. The new method gets rid of most of the circles connecting to dots issue that was in V1.
New Coins - Master, Rassilon, Omega, River Song, Doctor, Thingiverse.
Update 2: Uploaded another coin. One on left says "Doctor Who", the one on the right says "Thingiverse".
Update: Uploaded a copy from my harddrive instead of using the Tinkercad hosted one. Should be able to download now.