Nicaragua C 969 N22-N23 2 sheets not listed, 1980 year. Michel 2147AB Bl.127-128, Euros 100.00. 1980 Year of Alphabetization; IYC-1979; Apollo XI, 10th Ann. Yuri Gagarin, 1961; 1st Europe-America flight, Concorde, Zeppelin, WIPA-1981. Centenary of Nicaragua postage stamps, 1962, overprinted.