OpenSCAD model for a stackable coin token for games like Puerto Rico, 7 Wonders, etc.

coin.scad

$thickness = 2;
$outerDiameter = 20;
$innerDiameter = $outerDiameter - 2 * $thickness;
$center = true;

module coin($text) {
    difference() {
        cylinder($thickness, d=$outerDiameter, center=$center);
        cylinder($thickness, d=$outerDiameter - $thickness, center=$center);
    }
    translate([0, 0, $thickness])
        difference() {
            cylinder($thickness, d=$outerDiameter, center=$center);
            cylinder($thickness, d=$innerDiameter - $thickness, center=$center);
        }
    translate([0, 0, 2 * $thickness])
        difference() {
            cylinder($thickness, d=$innerDiameter, center=$center);
            translate([-2 * $thickness,-2 * $thickness,0])
                linear_extrude($thickness)
                    text($text);    
        }
}

translate([0,0,0])
    coin("1");
translate([$outerDiameter + $thickness,0,0])
    coin("5");