Public auction #42 on

1911. Trojicki sabor, šestobojna frankatura prvih šest vrednosti serije na filatelisticki inspirisanom pismu, pošiljaoc pionir srpske filatelije E. Derocco, upucenom iz Beograda nemackom trgovcu pošt. maraka P. Kosacku u Berlin, dolaz na poledini.
1911 "Journalists' Meeting", six-color franking, first six denominations of set on philatelically inspired letter, the sender was E. Derocco, the pioneer of Serbian philately, sent from Belgrade to Berlin, to German postal stamp trader P. Kosack, arr cds.