Other countries–Stamps of Slovenian interest

Kingdom of Yugoslavia

,146 (2), S 136 (2),Cover, franked with 40 para (Second weight tier rate, SHS postal rates). Mixed franking with Serbia. Within this tariff mixed franking was only possible for 14 days (!) The cover is sent from Belgrade (22.I.21) to Vienna. Only one other document with Serbian 15 para stamp in mixed franking is known. The cover has vertical crease.