1962 mixed currency 'top of the pile' taxed franking: 15-2-1962 printed matter commercial cover from TEL AVIV branch of Idud Ltd. franked 80 Pruta at the DO-11 period 8 Agora printed-matter rate using mix of late use pair 15Pr 1950 3rd Coinage Ba44 + pair 25Pr 1954 New Year Ba100, but returned to sender (marked by scarce "up" arrow cachets) as address unknown (cachet & manuscript on back); as envelope is printed at base "return payment guaranteed", this letter and all others to same addressee returned together with total tax calculated and applied to one of the covers placed at the top of the pile - here, charged 16 Agorot, the 8 Ag return fee (same as the sending fee) for 2 letters and paid for using Agorot frankings pair 0.08L 1961 Zodiac Ba208 tied by single strike of 19-2-62 TEL AVIV-23 postmark. Rare mixed currency franking cover.