cover 1871 (Sept.) envelope addressed to "Princess Henriette von Schleswig-Holstein, Schloss Primkenau, Schliesen" and bearing 1867 rouletted 2sch. lilac-carmine and yellow-green with 1869-73 perf. ½ sch. bronze-green and carmine-red (III printing) (three short perfs. at right) and 1sch. dull carmine and yellowish green, cancelled by straight line "HELGOLAND" with boxed "HAMBURG"/17 9 71/FRANCO" h.s. in red adjacent. A rare and attractive mixed issue franking. Lemberger certificate (1986). M. 3, 6c, 7a. Photo