Airmail overprint in dark purple type II (20 mm with double point) on 1/8 Menalek, 1 Menalek and 4 Menelak and pair 2 Menalek without overprint on registered cover Addis Abeba 10-1-1930 to London (arrival postmark registered Tooting 27-1-1930), postage rate for double weight letter, a fine to very fine cover, rare