Argentina air mail # C70 was issued for Letter Writing Week . Birds carrying letters . Pictorial Post Horn cancellation Nov 6 , 1957 , Buenos Aires , First Day of Issue . 1 stamp on 1 cacheted , train plane & boat , First Day Maxi Card . VF , See Scan . $1.50 shipping & handling to a USA address / NO SHIPPING TO CHINA or GERMANY , $3.00 shipping & handling elsewhere . Combine S/H - Add 25 cents more for each additional purchase . Please view my other worldwide listings . Thank You . APS # 196666