cover 1900 (24 March) "Maus" cover registered to Germany (7.5 arrival) bearing German P.O. "China" overprint 10pf. block of four cancelled by "TSINGTAU/KIAUTSCHOU" c.d.s. and C.I.P. 50c. block of four cancelled by smudged "KIAOCHOW" bilingual oval d.s. (same day). Fine