Australian States NSW 1878 1/- Diadem on Mourning Cover Sydney to France

1878 (28 Oct) small mourning cover from Sydney to Rouen, France franked with very late use of 1/- Diadem Perf 13 (replaced two years earlier by 1/- DLR), tied by Sydney duplex and French transit cds. Redirected to Germany upon arrival and charged '10' pfg. Rear flap with tears though an unusual example of redirected mail