1864 (16 Dec) Austrian PO - Unsealed E pm rate. 17, Printed Matter FL Cover AGRAM (Zagreb) to Virie, 1864, 2kr Yellow tied pmk 20/12, Ryan #19, Rarity factor 20, Scarce. MILIT. ST. GEORGEN/22/12 Transit and VIRJE/23/12 Receiving pmks on reverse, Very Clea