Don, I didn?t find a fitting translation myself so I had left it in its original form I would go with the googled one this time till someone comes up with something more eloquent,precisly it would be monthly door-plaques. These were intended to be fixed onto doors somehow.I am afraid though I never handled one myself I don?t know what material they are made of-cardboard,plastic,metal could be used.The ones from 35/36 do indeed look like postcards. Maybe someone else has such a "door-plaque" and can tell us more on them? Regards