cover 1902 (6 Aug.) "Maus" "red band" envelope registered to Germany, bearing China Dowager 9ca. block of four variety imperforate vertically between and the lower right stamp tête-bêche clearly tied by bi-lingual Kiaochow c.d.s., in combination with Kiautschou 1901 10pf. and 50pf. tied by "TSINGTAU/KIAUTSCHOU" c.d.s. and showing arrival d.s. on reverse. A most attractive and unique franking. Photo