CREATE TABLE table_54128 ("Date of Issue" TEXT, "Denomination" TEXT, "Design" TEXT, "Paper Type" TEXT, "First Day Cover Cancellation" TEXT)

What's the Denomination listed for the Date of Issue 12 April 2005?
SELECT "Denomination" FROM table_54128 WHERE "Date of Issue" = '12 april 2005'
SELECT "Denomination" FROM "table_54128" WHERE "Date of Issue" = '12 april 2005'