A "Maus Cover". Registered cover from Kiaochow to Germany. CIP 50c vertical pair x 2 canceled by Kiaochow Bilingual Oval Dater on Mar. 24, 1900. German Post Office in China 10pf block of 4 canceled by German Tsingtau Kiautschou P.O. CDS on Mar. 24, 1900. German Tsingtau P.O."R" label.
On the back transit Baden-Baden CDS of May 7, 1900. Arrival Lichtenthal CDS of May 7, 1900.