1971, Olympic gold medallists from ITALY perf. miniature sheet 14b. 'emblems of the Mexico, Munich, Tokyo and Rome Games' and imperf. miniature sheet 14b. 'emblems of the Sapporo, Grenoble, Innsbruck and Squaw Valley Games' in an investment lot with about 730 (perf.) and 30 (imperf.) miniature sheets, mint never hinged, Mi. Bl. 177/78, € 9.300,--
1954, Provisionals, 24b. on 1l. overprint "airplane and year date", 25 copies in half a sheet with corner margins (upper half with sheet number), c.t.o. "Sana´a 31.5.62". Not listed in the catalogues. The history of the 1954 provisionals is not completely explored yet. There are diverse overprints on regular issues known. They probably were produced by the Ministry of Communications but never used officially. They are quite rare and not offered very often.