Two maker coin designs. Both share the similar design - five concentric rings that are free to rotate on pivot points. The "maker coin 2" comes in two versions, "2w" has slightly wider gaps between rings so is easier to separate. The second design, "maker coin 4", has an additional pattern embossed on top (again, "4w" has wider gaps).

The surface finish shown in the photos comes from the slicer (Slic3r): the recessed surface is gyroid infill with no top layer, and the raised surface is the top layer with the Hilbert curve pattern. In order to get different settings in different parts of the model, I used Slic3r modifier mesh, which is the second STL file (4x.stl). It's used to make Slic3r apply different settings to the part of the model inside the "box" created by this second file, so I set the primary settings to print with sparse infill and the Hilbert curve top layer pattern, and the modified settings inside the box are 50% gyroid infill and zero top layers.

Printed on Prusa i3 MK2.5 using a variety of filaments, the ones in the photos are Filamentum Gold Happens and Filamentum Vertigo Grey.