Philadria d.o.o. - catalog 16th auction - October 2016
,4, P 5 (2),Parcel card, franked 2,20 K. Due to shortage of stamps two 1 K. postage due stamps were used as definitives. Sent from Celje (4.IV.19) to Zagreb (919 APR 5). The use of postage due Krona values as definitives was rare in Slovenia.