Type in the letters that appear in the bottom corners of the stamp. For example
if the lettering is A B simply type AB or ab into the box below and click
search to find scans of stamps that match the relevant lettering combination. The complete 240 Nissen photographs contained in this search engine show
all plates for each of the 240 lettering combinations which includes plates 1a, 1b, 2, 3, 4, 5, 6, 7, 8, 9, 10 & 11.
You will also find higher resolution scans of individual stamps and 1d Reds printed from the 1d Black plates.