Glued to the bottom of the clipboard (hot glue). Dimensions fit for DIN A4 narrow side. Outer dimensions of the shell: 202 x 24 x 20 mm.
Designed for Maul 23920. The recesses for the rivets are quite large, should fit other DIN-A4 clipboard models.
edit 06/26/22
Added an improved design (Stiftschale22), can now be used hanging on the wall. Just a try, has not been printed yet.
The author marked this model as their own original creation.