1866-70 Serpentine roulette III, 8p black on green horizontal pair, 40p lilac rose, tied by Postal Car pmks on cover, sent via St. Petersburg (12 May, 1875) to Switzerland, with transit and Lichtensteig arrival pmks, fine, with 2009 Scheller certificate (catalogue value for single 8p on cover) cat. $2850 (Cat No. 7,10) (Image)

Cat. $2850, Est.US$1,500