Perfin for this issue are shown in a list that was printed in Scoutpost-Information January 1986 (the club journal for ArGe Pfadfinder, the German scout stamp club). All these perfins are made by private companies, and most are initials of the company name.
The list mentions a perfin "PAR" on the 7½c stamp.
PAR = P.A. Regnault's Verffabrieken.
Thanks to Hallvard Slettebø
ArGe Pfadfinder: Scoutpost-Information January 1986