20c on 1p bistre & deep blue '400th Anniversary of Cartagena' overprint issue, a superb unmounted mint block of fifteen comprising three complete columns from the sheet with sheet margins on three sides. (SG 456)
20c on 1p bistre & deep blue '400th Anniversary of Cartagena' overprint issue, a superb unmounted mint block of fifteen comprising three complete columns from the sheet with sheet margins on three sides. (SG 456)