P_172a= dated June 30, 1969 P_172b= dated October 28, 1975, serial number varieties
~ sorszám különbségek P_172c= dated September 30, 1980 P_172as, bs, cs = MINTA (specimen) overprint ~
MINTA felülnyomat
PNL~ Pick Nem Jegyzi = P_172a
test print ~ próbanyomat (see below)
