▁among ▁their ▁phil atel ic ▁products . ▁They ▁also ▁offered ▁year - sets ▁in ▁folders ▁at ▁a ▁prem ium ▁both ▁for ▁st amps ▁and ▁First ▁Day ▁Co vers . ▁ ▁In ▁December ▁ 2 0 1 7 , ▁the ▁World ▁Online ▁Phil atel ic ▁Agency ▁( W OP A ) ▁recogn ised ▁an ▁Est onian ▁stamp ▁designed ▁by ▁Ind rek ▁Il ves ▁and ▁dep ict ing ▁a ▁l yn x ▁as ▁the ▁most ▁beautiful ▁stamp ▁of ▁ 2 0 1 7 . ▁ ▁See ▁also ▁ ▁J oint ▁issues ▁of ▁Est onia ▁List ▁of ▁people ▁on ▁st amps ▁of ▁Est onia ▁Post age ▁st amps ▁and ▁postal ▁history ▁of ▁Lat via ▁ ▁Notes ▁and ▁references ▁ ▁Further ▁reading ▁ ▁A ru , ▁Mart . ▁E esti ▁v ab ari igi ▁post m arg id ▁ja ▁ter vik as j ad ▁k atal o og ▁= ▁Catalogue ▁of ▁Republic ▁of ▁Est onia ▁post age ▁st amps ▁and ▁postal ▁station ery . ▁T all inn : ▁E esti ▁Mu ins usk ait se ▁Sel ts ▁Fil ate eli ato im k ond , ▁ 2 0 1 0 ▁ 2 0 5 p . ▁( 9 th ▁Edition ). ▁ ▁H urt , ▁V amb ola ▁and ▁El mar ▁O j aste . ▁Est onia : ▁Phil ately ▁& ▁Post al ▁History : ▁Hand book , ▁Catalogue ▁= ▁Est land : ▁Phil atel ie ▁& ▁Post geschichte , ▁Hand buch , ▁K atalog . ▁Stockholm : ▁Est onian ▁Phil atel ic ▁Society ▁in ▁Sweden ;