1916-17 Registered Letter Surcharge 5c on 8c Black and Plum mint accumulation of multiples including blocks of 20 (2), 14, 10 () and smaller, with block of 4 and pair including uncatalogued error 's' of 'cts' sideways. A number of pieces are damp affected causing the ink of the surcharge to run, and gum generally toned. Nevertheless, a useful quantity for research. SG No. R175, cat £644 (161)